Fangirlitis 

(noun) ; a sickness contracted after being in a large area/stadium/arena full of Fangirls. Not fatal but extremely sucky. Symptoms include; sore throats, soreness of legs, headaches and drowsiness.

Dude, after that concert I got fangirlitis! My throat hurts and everything.

Fangirlitis by randomfangirl September 15, 2014

Fangirltasy 

an extravagant and unrestrained imaginary event, where a normal action is excessively awed and appreciated. usually accompanied by screaming and "glomping".

Danie's Status: TOTAL FANGIRL MOMENT TOMORROW!!

Andrei: what time will it be?

Danie: who?

Andrei: the object of your fangirltasy/ies?

Fangirltasy by Amazing ADO May 15, 2009

Fangirlistic 

What fangirls are, but typically refers to the really obsessive ones. A derivative of fangirlism, there is no known cure. Possible coping methods include staring at said obsessions, daydreaming about said obsessions, drawing pictures of said obsessions, reading fanfiction of said obsessions, masturbating to thoughts of said obsessions, etc., etc., etc. Uh... yeah.

Random Loser 1: I got an actual nosebleed last night staring at a picture of Levi Ackerman.
Random Loser 2: Bro, get your ass to a doctor. You're fangirlistic as frack.

Fangirlistic by Slightly Anonymous Loser May 26, 2015

Fangirlilisation 

The process in which a older individual will 'fan girl' over a random object/sport and like any fan girl, will get really into it so much it becomes obsessive.

example:old people and lawn bowls they will get really into it and get aggressive if you badmouth the sport.

Guy 1:Did you hear about Dylan's step dad?
Guy 2:No

Guy 1:He apparently is starting to go through fangirlilisation over bowels.
Guy 2: Really how far along is he?
Guy 1: Hes starting to make really bad bowls jokes or mention it every two sentences.
Guy two: That is really sad....

Fangirlilisation by PrometheanDelta November 15, 2015