The Second Thing You think of when you hear. TWILIGHT, JUSTIN BIEBER, AND ANYTHING ANNOYING. These Things are soo annoying you want to rip out your Eardrums when you hear them speak because they have no life (except of their so called friends who only have 2-3 things in common.) and they talk about absolute shit. Because they would instantly buy a $20.00 magazine for paragraph of rumours and a guy that knows a guy who did something to do with Shit.
Picture a nice Packed mall then:

Obsessed Fangirl #1: Did you hear that Justin Beiber did nothing today

Obsessed Fangirl #2: OMFG! that is soo amazing tomorrow we should do nothing.

Obsessed Fangirls: SCREAM!!!!

INSERT YOUR NAME HERE: Whats wrong?

Obsessed Fangirls: We are talking about JB.

INSERT YOUR NAME HERE: Oh your talking about that Gay Faggot.

Obsessed Fangirls: Fuck off don't talk about our Justy like that.

Now your nice trip to the mall has been ruined by Teen Brats.
by Rokios January 11, 2012
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A girl who goes over the top as a service to her favorite person/thing.
"Did you see that fangirl at the anime convention? She had on this gay Naruto costume.
by Atomisk March 12, 2005
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Someone who is so closely involved with certain fandoms (whether it be a book series, a tv show, a celebrity, etc etc) that it completely destroys their mental health and social life. Someone who can't go 10 minutes without thinking about their obsession and crying silently to themselves. These types of people have had their lives taken over, so don't act surprised when you find their secret shrine at the back of their closet.
"Hey, is Emma coming to the party tonight?"

"Nope, she's gonna be in her room for the rest of the night watching Twilight reruns."
"Oh yeah, I forgot she was an Over-Obsessive Fangirl."
by Mh188 August 11, 2018
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Obsessed with six the musical
Won’t shut up about it
Kins nagito probably
But then again, we love them
Katy: guys..don’t lose your head..

Callum: here we go again Katy Perry Obsessed Fangirl
by The best bisexual August 31, 2021
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