# delulu

CEFR C1 · Adjective

Source: https://englishreference.com/word/delulu
Updated: 2026-08-14

## Definition

a funny, informal way of saying someone is 'delusional'. It often means you believe in something that is clearly not real or true, especially about a crush or a celebrity.

For teachers: being unrealistically hopeful or believing in something that is clearly untrue. An informal slang clipping of 'delusional', often used with self-aware humor in romantic or fandom contexts.

## Examples

- Thinking that celebrity will answer you is a little delulu.
- My friend is fully delulu, convinced her crush's vague social media post is secretly about her.
- Some fans embrace a 'delulu' mindset as a playful, communal way to engage with their favorite artists, fully aware of the fantasy.

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.