When you're having sex with a guy and you randomly sing "Jason Derulo" loud enough for your roommate to hear so she doesn't feel lonely. Singing Jason Derulo's name also confuses the said sex partner into automatic orgasm.
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!!!!!!
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
The meaning of perfection. Anyone that goes by that name will be loved by everyone forever. People with this name will have the best personalities, they'll be funny, smart, attractive, and have a goodsense of humor. When Dejua cries, we all cry. Her self esteem may be low, but her prince charming will be there for her when she needs him. This is to anyone with this name: Keep your chin held high, you have a bright future, no one will take that away from you. Wipe your tears from under your eyes and remember there are people who will fight for you no matter what