# What does delulu mean?

Canonical: https://postmesh.app/glossary/delulu

By PostMesh team. Published 2026-10-31; updated 2026-10-31.

Delulu is a playful short form of "delusional." It describes believing something unrealistic, like that a celebrity will notice you or a crush secretly likes you back, usually by choice and with a wink. It began in K-pop fandom, and "delulu is the solulu" turns it into a joke about optimism.

## What delulu means

Delulu means delusional, but the cute spelling softens it. It's used for hopes and beliefs that are clearly out of touch with reality, and usually ones the person knows are unrealistic. Planning your wedding to a pop star you've never met is delulu. So is deciding a stranger likes you because they held the door, or assuming you'll be promoted next month when you started last week.

Cambridge Dictionary, which added the word in 2025, defines it around the idea of holding beliefs that aren't true, and doing so on purpose. That on-purpose part is the heart of it. Most of the time delulu isn't about being fooled. It's about enjoying a fantasy on purpose, and saying so out loud.

It can be self-deprecating ("I'm so delulu about him"), teasing ("you're delulu if you think he's texting back") or, more recently, almost aspirational. The phrase "delulu is the solulu" flips the word into a motto: a bit of unrealistic self-belief might be exactly what gets you somewhere.

**Fun delulu**
- A harmless fantasy you know isn't real
- Celebrity crushes, daydreams
- Shared as a joke

**Motivational delulu**
- Believing in a big goal before it's realistic
- "Delulu is the solulu"
- Confidence as a strategy

**Bad delulu**
- Ignoring clear signs, like being left on read
- Reading interest into nothing
- Can lead to real hurt

## Where delulu comes from

Delulu was born in K-pop fandom. The earliest known example on Know Your Meme comes from OneHallyu, a K-pop forum, on April 6, 2014, when a user called fans who were convinced two idols were dating delulu. Two months later, on June 19, 2014, a user from the same forum submitted a definition to Urban Dictionary describing a fan who believes they will end up with their favorite idol. TODAY places its first appearance in the K-pop community around 2013. Either way, it began as a gentle jab at obsessive fans.

For years it stayed mostly inside fandom spaces on forums and Twitter. Know Your Meme says it moved onto TikTok and became general slang in November 2022, helped by skits like a December 2022 video about "delulu girls" that drew millions of plays. By February 2023, creators were remarking that the word had escaped K-pop entirely.

### Delulu is the solulu

In 2023 the word picked up a positive spin. TODAY reported in October 2023 that being delulu had shifted toward a mindset of confidence, with a TikToker named Moses Wong summing it up as staying delulu being the solulu, or solution. The article pointed to Sabrina Bahsoon, known as Tube Girl, as a poster child: her confident dancing videos on the London Underground inspired copycats in other cities. TODAY also noted pushback, with some users warning about "bad delulu," the kind that ignores reality to your own cost.

### Into the dictionary

In August 2025, Cambridge Dictionary added delulu among more than 6,000 new words, NBC News reported. CBS News noted that the same year, Australian Prime Minister Anthony Albanese used the phrase "delulu with no solulu," a sign of how far the word had traveled from fan forums. Eleven years after its earliest known use on a K-pop forum, a head of government was saying it in public.

- Apr 6, 2014: Earliest known use on the K-pop forum OneHallyu
- Jun 19, 2014: A fan-written definition appears on Urban Dictionary
- Nov 2022: Delulu moves onto TikTok and becomes general slang
- 2023: "Delulu is the solulu" turns it into a confidence motto
- 2025: Australia's prime minister says "delulu with no solulu"
- Aug 2025: Cambridge Dictionary adds delulu

*Dates from Know Your Meme, TODAY, NBC News and CBS News.*

## How people use delulu on social media

On TikTok, delulu is everywhere in dating and fandom content: skits about inventing a whole relationship from one glance, POV videos about manifesting a dream job, and comments like "the delulu is strong in this one." On Instagram it shows up in captions on selfies and in Notes, often self-aware. On X, K-pop fans still use it in its original sense about shipping idols. In DMs and group chats, it's how friends check each other: "be honest, am I being delulu?" It's rare on LinkedIn, though "delulu is the solulu" occasionally appears in posts about chasing big goals.

Some made-up examples:

- A caption on a concert photo: "he looked at my section, so we're basically engaged. delulu"
- A text to a friend: "he liked my story from 3 weeks ago, is it delulu to think he's into me"
- A comment on a manifesting video: "delulu is the solulu, I'm applying anyway"
- A teasing reply: "you think the landlord will lower the rent? delulu"
- A self-aware bio line: "professionally delulu"
- A comment under a ship edit: "the delulu in these comments is beautiful"

If you want a playful line like that in your profile, the [TikTok bio generator](/tools/tiktok-bio-generator) can suggest a few, and our guide on [scheduling TikTok videos](/blog/how-to-schedule-tiktok-videos) helps if you post skits on a schedule.

## How to reply to delulu

If a friend says they're being delulu, they're usually inviting you to play along or to give a gentle reality check, and you can often tell which from how they ask. "Am I delulu?" is a request for honesty. "I'm so delulu lol" is a request for company in the fantasy. If someone calls you delulu, it's most often teasing. Agreeing cheerfully takes the sting out, and "delulu is the solulu" is a ready-made comeback.

**Someone brought up delulu. What do they want from you?**
- "Am I being delulu?" → An honest read. Be kind, but tell them what you actually see.
- "I'm so delulu lol" → Company in the daydream. Play along.
- "You're delulu" aimed at you → Usually teasing. Reply "delulu is the solulu" and move on.
- A K-pop fan about a ship → The original sense: fans imagining idols together. Enjoy or ignore.

## Is being delulu a good thing?

The motivational version of delulu has real fans and real critics. In TODAY's 2023 report, psychotherapist Alison McKleroy described it as something close to a self-efficacy tool, a way of building belief in yourself and some resilience along the way, while recommending balance and self-awareness. The same article quoted a New York tech worker who found belief a useful motivator but didn't fully buy the slogan.

A practical way to think about it: delulu helps when it gets you to act, like applying for the job, sending the message or posting the video you were scared to post. It hurts when it replaces acting, or when it keeps you waiting on someone who has already given you a clear answer. Believing you'll get the role is motivating. Believing someone who hasn't replied in a month is just busy is the bad kind.

## When not to use delulu

Delusion is also a real symptom of serious mental illness. Delulu is a joke about chosen fantasies, and it shouldn't be used to describe someone who is actually unwell or to mock someone's mental health. If a friend's beliefs are worrying you for real, drop the slang and talk plainly.

It also stings more than it sounds when aimed at a stranger. Telling someone online they're delulu for their hopes about a career, a relationship or their art is dismissive, even with a cute spelling. On brand accounts, delulu works best pointed at your own product in a self-aware way ("delulu enough to think we can make Mondays fun") and badly pointed at customers. In professional writing, choose unrealistic or overly optimistic instead.

**Delulu is fine when**
- [ ] You're joking about your own crush or daydream
- [ ] A friend asks for a playful reality check
- [ ] You're cheering on a big goal with "delulu is the solulu"
- [ ] It isn't about someone's real mental health

## Delulu phrases and related slang

A few fixed phrases have grown up around the word, most of them built on the same trick: take a serious word, make it sound cute, and the criticism lands softly. That rhyming habit is also why solulu exists at all, and you'll rarely see it anywhere outside those two phrases.

| Phrase | What it means |
| --- | --- |
| Delulu | Playfully delusional, often by choice |
| Delulu is the solulu | Unrealistic self-belief as the solution |
| Delulu with no solulu | Delusional with no plan or way out |
| Bad delulu | Ignoring reality in a way that hurts you |
| Delulu fan | The original sense: a fan who thinks they'll end up with an idol |

Delulu sits in a cluster of dating slang. [Rizz](/glossary/rizz) is what you hope your crush has noticed, [the ick](/glossary/ick) is what ends the fantasy fast, and a [simp](/glossary/simp) is someone whose delulu turns into one-sided effort. When a relationship finally becomes real, people announce it with a [soft launch](/glossary/soft-launch).

## Questions

### What does delulu stand for?

It isn't an acronym. It's a playful shortening of delusional.

### What does delulu is the solulu mean?

That a little unrealistic self-belief is the solution. Solulu is a rhyming take on solution, and the phrase is half joke, half motivation.

### Is delulu an insult?

It can be, but usually it's gentle. People mostly use it about themselves, or to tease a friend who's in on the joke.

### Where did delulu come from?

K-pop fandom. Its earliest known use is on a K-pop forum in 2014, describing fans convinced that idols were dating or that they'd end up with one.

### Is delulu in the dictionary?

Yes. Cambridge Dictionary added it in August 2025, describing it as holding untrue beliefs, typically on purpose.

### What does delulu with no solulu mean?

Delusional with no plan to back it up. Australian Prime Minister Anthony Albanese used the phrase in 2025.

## Related terms

- [Rizz](https://postmesh.app/glossary/rizz)

- [Ick](https://postmesh.app/glossary/ick)

- [Simp](https://postmesh.app/glossary/simp)

- [Soft launch](https://postmesh.app/glossary/soft-launch)

- [Pookie](https://postmesh.app/glossary/pookie)

## Sources

- [Know Your Meme: Delulu](https://knowyourmeme.com/memes/delulu)

- [TODAY: TikTokers are embracing delulu (October 2023)](https://www.today.com/today/amp/rcna117393)

- [NBC News: Cambridge Dictionary adds skibidi and tradwife among 6,000 new words](https://www.nbcnews.com/pop-culture/pop-culture-news/cambridge-dictionary-adds-skibidi-tradwife-6000-new-words-rcna225566)

- [CBS News: Cambridge Dictionary adds skibidi, delulu and tradwife](https://www.cbsnews.com/amp/news/cambridge-dictionary-new-words-skibidi-delulu-tradwife)