A long term condition of being chronically delusional (aka delulu).
Kurt’s friend has deluluitis.
by its_seal November 5, 2023
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A delusional fan girl/boy who believes they can/will end up with their favourite idol or celebrity and invest an unhealthy amount of time and energy into said idol.

High levels of delulus are found in the following fandoms:
One Direction, Justin Bieber and various Kpop fandoms.

As the vast majority of them are teenage girls, their emotional maturity is almost always below zero and thusly cannot conceive the sheer thought of their idol feeling real human emotions and not actually belonging to their fans (let alone dating somebody who is not them).

Delulus often attack at the slightest hint of criticism towards their bias celebrity and are rather vicious. Note: They also have trouble separating fantasy from reality.
Commenter: It was a good performance. The last note was flat but other than that, his vocals were impressive.
Delulu: OMFG BITCH YOU DIEEEEEEE!!!!!!
by eyeofink June 19, 2014
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sometimes humorous but mostly sarcastic way of saying "Delusional" in fandoms to take a jab at opposing factions.
I can't believe fandom X thinks their ship is canon, they're so delulu LOL
by Fandomgalorz December 31, 2016
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Its when someone is actually insane and believes things that arent real but you dont wanna be really mean about it so you call them delulu instead of saying delusional idfk
dawg ur DELULU
by doinkass May 5, 2023
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Delulu or delulu is a shorter term for delusional mostly used in the Kpop world to describe and/or mock a fan that believes they'll date, marry, or befriend their favorite idol.
Person 1: Bang Chan is so hot. One day i will date him! And if i don’t get him i will get Lee Know!

Person 2: Bro you’re delulu…

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Person 1: Maybe i will have my Y/N moment when i go to the BTS concert and Jungkook will notice me!

Person 2: You are absolutely delulu. Are you okay?

(Although don’t we all wish to have our Y/N moment?)
by leoooooo0oo February 4, 2023
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Short for delusional (an abbreviation), it’s often used by people (Most likely Gen Z) who think they can end up with their crushes or favorite celebrities / actors. Became popular on tiktok 2023, now everyone calls themself “Delulu” when they think of the most obscure things with their crushes or favorite celebrities / actors.
Abbie: ughhh, Justin looked at me in school today! He definitely wants me.
Mia: Omg GIRL he wants you so bad, I bet he’s thinking of you right now!
Abby and Mia: *Fangirling.*
Kat: Ugh. You guys are so delulu.
by switchrad July 1, 2023
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