delulu

What does delulu mean?

Delulu is "delusional" with the sharp edges sanded off. The doubled last syllable makes it sound like baby talk, and that softness is the point: calling yourself delulu admits that a hope is unrealistic while refusing to give it up. Cambridge Dictionary, which added the word in 2025, defines it as believing things that are not real or true, usually because you choose to. That last clause, because you choose to, is what separates delulu from the clinical word it came from.

There are three common uses.

• Fandom fantasy. Believing a pop star would date you, or reading a celebrity's every glance as a secret message. This is the original meaning.
• Romantic overthinking. Treating a crush's two-word reply as proof of love. Dictionary.com notes the word is often aimed at obsessive fans and at dating partners who act erratically.
• Self-belief, played for laughs. Expecting to land the dream job, win the lottery or pass the test with zero preparation. This is where "delulu is the solulu" lives.

As a noun, it names the person or the state: "she's a delulu," "my delulu is showing."

Examples

• Fan account: "he waved at the crowd and I'm 90% sure it was at me. yes I'm delulu"
• Group chat about a crush: "she said 'lol' to my joke, we're basically engaged" / "girl you are SO delulu"
• Job hunting: "applying to jobs I'm not qualified for because delulu is the solulu"
• Exam week: "haven't studied, still expecting an A. delulu era"
• Sports fan: "my team is 2 and 9 and I'm still planning the playoff party. delulu"
• Parent overhears: "I'm being delulu, but what if Mom says yes to the concert"
• Friend checking in: "be honest, am I delulu or did he actually flirt?"

The word sits at the end of a sentence as a self-diagnosis, or at the front as a label ("delulu thought: ..."). When said about yourself, it is a joke. When said about someone else, it can be a joke or a reality check, depending on the tone.

Where did delulu come from?

• Late 2013 to early 2014. Dictionary.com dates the first uses to the K-pop fan community, where fans used it to mock obsessive fans who believed they could date idols, sometimes including themselves. Tweets from January 2014 already use it that way. Fan forums such as OneHallyu are often cited as an early home.
• Through the 2010s. It stays mostly inside K-pop and other stan communities, applied to "shippers" who insist two celebrities are secretly together.
• Early 2020s. It spreads to general social media and becomes a popular TikTok hashtag, Dictionary.com notes. Along the way it flips from insult to badge, and the rhyme "delulu is the solulu" turns delusion into a mock self-help motto.
• March 2025. Australian Prime Minister Anthony Albanese tells parliament the opposition is "delulu with no solulu," a moment widely covered in Australia and later cited by CBS News.
• August 2025. Cambridge Dictionary adds delulu in an update of about 6,000 words that also included skibidi and tradwife. Korea JoongAng Daily covers the addition as a K-pop fandom word reaching the dictionary.

Credit goes to international K-pop fans, who built a large share of today's online fan vocabulary.

Is delulu rude?

Usually not. Most people say it about themselves, which makes it self-mockery, not an insult. Between friends, "you're delulu" is the gentle version of "be realistic," closer to teasing than to criticism. Schools would not object to it.

It can sting in two cases. Telling someone their real hope, like getting into a competitive program, is delulu can land as a put-down. And because it is a cute form of "delusional," it is a poor word for anyone dealing with actual mental illness. A parent or teacher can point out that difference without banning the word.

How to reply to delulu

• A friend says "call me delulu but I think he likes me": "Not delulu if he texted first. Show me the messages."
• Your teen says they're delulu about a big goal: "Delulu with a plan is just ambition. What's step one?"
• A coworker jokes "I'm delulu enough to think this will ship on time": "Same. Let's cut one feature and make the delulu real."

Delulu vs parasocial

These two often show up together. Parasocial, Cambridge's 2025 word of the year, describes a one-sided bond with someone who does not know you, like a streamer or singer. Delulu describes the belief that grows out of that bond, such as being sure the singer would like you in person. One is the relationship; the other is the fantasy about it.

Is delulu still used in 2026?

Yes. Delulu ranked 23rd among the most-searched Gen Alpha slang terms of 2026 in Mental Floss's roundup of Google search data, and WeAreTeachers lists it in its 2026 guide. The fandom insult phase is long over; today it is mostly a cheerful self-label, especially in dating talk around words like situationship and the ick. See the dating slang guide for the rest of that vocabulary.