Followers of a certain person, religion, or cult.
"Look, it's Cire25's fangirl cult religion brigade!"
by OinarinYuu February 27, 2017
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All those girls obsessed with Orlando Bloom, Tom Hardy and those such fags.
Anyone with a screenname like "TomHardysImzadi" must be a fangirl.
by matt February 9, 2004
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A girl obsessed with an actor, book, tv series, etc. Keep in mind the male counterpart the “fanboy” also exists, but fandoms are female predominated. Girls like this will kill you and/or severely injure you if you utter one ill word of their otp, fandom, favorite actor, etc. Mind your tongue around them.
Fangirl 1: What is your OTP?
Fangirl 2: Oh definitely Destiel, Pipabeth, and Sabriel
Non-Fandom Member: But you can't have more—
Fangirl 2: Shhhhh....
Non-fandom member: But it's called a One True—
Fangirl 1: Shhhhh....
by cuz fuck you thats why February 2, 2015
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1. Usually a girl who pretends to have absolutely no self esteem whatsoever in an attempt to get the attention of a celebrity. Either they're pretending or they really don't have any self esteem. These people have an unhealthy obsession and will stop at nothing to get attention. These people have no lives; their celebrity obsession is their priority/occupation/etc... (figuratively, that was a joke kinda)

2. A girl who has a firm grasp on her emotional investments and can laugh and joke about her infatuation with a celebrity. These people have a healthy fascination, are able to lead normal lives, and will probably be better off in this world...
1. @somefangirlontwitter: Hi Austin Mahone, ILYSM will you follow me? Notice me please? Follow me? I would do anything for you to follow me. I'll eat my shoe if you follow me. Here I bought you a $500 skateboard are you gunna meet me to get it? I also bought you a hat. And I'm giving you my soul. *austin mahone follows* *changes username* @austinmahonefollowedme: OMG THANK YOU AUSTIN I'M CRYING ILYSM *proceeds to obsess for what seems like eternity*

2. @normalgirlontwitter: austin mahone is super cute haha i'm such a fangirl. congrats on the vma! *austin mahone follows* OMG austin followed me! Freaking. Out. *goes back to life*
by katanatattackally August 29, 2013
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A fangirl is like a groupie, only underage or extremely unattractive. Groupies follow the band/artist/celebrity around and sleep with them. Often, fangirls say how much they would LOVE to sleep with the member and basically obsess over the band and/or musician it is normal to find posters and pictures of a certain celeb all over their walls and as their desktop background. They also make other, more normal fans look bad. How to eliminate a fangirl: garlic and sufficient sunlight work.
FG fangirl: OH EM GEE, IT'S RYAN CABRERA! I LOVE YOU RYAN! I LOVE YOU SO MUCH!!!

RC Ryan...: ????
by katastrophe May 18, 2008
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The art of obsessing over fandoms, the characters in the fandoms, the actors who play the character ( if the fandom is a film/show ) etc.......
Just saying something to do with a fangirls fandom will usually lead to them frantically crashing into the room youre in making high pitched sounds that to you might sound meaningless, but to other fangirls will make total sense
Person : Dean Winchest-
*loud crashing noises*
*sound of footsteps*
Fangirl: ASDFHIHEWCBEDIHBQQDIYCBFQEYULCQGEDTOUCEDQVTOQWDVUWVUTWSYVQDWGUVWXUK WHO THE HECKLES JENSEN ACKLES SAID THE NAME OF BABY!?!?!?!?!?!?!?!?!?!
Person: fangirling again?
Fangirl: *nods while spasming on the floor*
by Sabrielxdestiel April 5, 2015
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