In short
What does Delulu mean?
Delulu is internet slang for "delusional," often used playfully to describe unrealistic expectations or a self-confident belief in achieving ambitions.
Where does Delulu come from?
Delulu comes from the English word delusional and was first recorded in English in the early 2010s. It originated in K-pop fandom online communities before spreading to general social media, particularly TikTok, in the early 2020s.
- English Delulu (early 2010s)
- clipping of English delusional with reduplication of the second syllable "-lu-"
Origin established
Etymology at a glance
- Language
- English
- Original form
- delusional
- Original meaning
- internet slang for delusional
- First recorded in English
- January 13, 2012
The story of Delulu
Where It Came From
Delulu comes from the English word delusional, shortened by clipping and then reduplicating the second syllable. This form emerged in K-pop fandom online communities in the early 2010s. It was first recorded on Twitter in January 2012. The earliest documented use in a K-pop forum was by user "tinkeobel" on OneHallyu in April 2014.
How It Spread
Delulu spread from K-pop communities across social media platforms. It became a more general term for "delusional" across social media in the early 2020s. The word gained massive traction on TikTok starting in 2023, especially among young women. By December 2023, the hashtag #delulu had over five billion views on TikTok. Delulu entered mainstream political discourse in March 2025 and was added to the online Cambridge Advanced Learner's Dictionary in 2025.
Who Says It
Delulu is typically used by young people online, especially on social media platforms like TikTok. It is often used humorously or playfully.
Myths and Mix-ups
Verdict: Disputed The phrase "Delulu Is The Selulu" is sometimes attributed to Filipino internet culture. However, the word Delulu itself is widely confirmed to have originated in K-pop fandom online communities.
How has the meaning of Delulu changed?
- Originally used to mock individuals in K-pop fandom with unrealistic hopes about meeting celebrities (early 2010s/2014)
- shifted to characterize unapologetic, bold, and joyously self-confident belief in achieving one's aspirations, often playfully (TikTok, starting 2023)
- now often means influencing one's life through force of will, similar to the "manifesting" movement.
How is Delulu used today?
Delulu is used as an adjective to describe someone who is playfully unrealistic or has an unapologetically self-confident belief in achieving their ambitions. It can also be used as a noun to refer to delusion or a delusional person.
- "She's so delulu if she thinks she's going to win the lottery without buying a ticket."
- "His delulu about becoming a rock star keeps him motivated."
- "Embrace your delulu and manifest your dreams."
Quick answers about Delulu
- What does Delulu mean?
- Delulu is internet slang for "delusional." It describes someone who has unrealistic expectations or a self-confident belief in achieving their ambitions, often used in a playful or humorous way.
- Where does Delulu come from?
- Delulu comes from the English word delusional. It was formed by clipping the word and reduplicating the second syllable "-lu-". It originated in K-pop fandom online communities in the early 2010s.
- When was Delulu first used?
- Delulu was first recorded on Twitter in January 2012. It gained significant popularity on TikTok starting in 2023, spreading from K-pop fandom to general social media.
Entries that mention Delulu
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Sources
- Merriam-Webster
- Cambridge Dictionary
- Collins English Dictionary
- Dictionary.com
- Wiktionary
- Know Your Meme
- Urban Dictionary (evidence of early use)