someone who over reacts when they see, hear about, or think about a famous band, actor, anime character, or youtuber (btw i only know this cause im a full time fangirl) (ONE DIRECTION, 5SOS, O2L, CONNOR FRANTA, AND MORE YOUTUBERS, CHANNING TATUM, AND ADAM LEVINE ARE MINE)
Average Fangirl: Harry Styles is like so hot :D
Me: IM GONNA MARRY HARRY STYLES AND WE'RE GONNA HAVE LITTLE BABY HARRYS AND WE'RE GONNA LIVE IN THE AFRICAN JUNGLE AND GET ALONG WITH ALL THE ANIMALS OMGGGGGGGGGGGG
Overly Obsessed Fangirls: I WILL KILL ANYONE WHO EVEN THINKS ABOUT HARRY AND I WILL FEED YOUR BODY TO TIGERS
by Hoopzzzzz October 12, 2014
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Fangirl is one who obsesses over celebrities, fictional characters, et cetera. These delicate creatures can also be known as ‘Otakus’, but typically an otaku is one who spends all day inside, alone, and watching anime. You could very easily say that a very large proportion of tumblr users are, in fact, fangirls.

However, fangirl isn’t just a name; it’s also and action. For example, you could say you ‘fangirled’ over something, meaning you had a moment in which you probably squealed like a pterodactyl over something/someone.

Fangirls are VERY sensitive about their OTP’s, so be careful what you say in front of them...
Tina: I LOVE Tom Hiddleston SOOO much!
Lucy: You are such a fangirl...
by pseudōnymos anne June 24, 2014
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A girl whose love for a fictional character inspires them to create their own OCs.

These people are typically ridiculed by boys with no artistic capabilities and hobbies who just wanna take the fun out of things for girls or just others.
Quara Sans' Girl is a well know Sans "Fangirl"

She's known for her great art and animation
by Calico Hax January 11, 2022
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The spawn of satan,
no older than 11 or 12.
These young cringelords enjoy forcing a fictional character into a relationship with themselves.
A fangirl will typically wander the dark and gloomy halls of Youtube.
These horrid creatures come in different shapes and sizes
Most times they actually attempt making their own art or use Gacha.
Guy1:Hey ___ is such a fangirl

Guy2:I know right?Cringe!
by Photo!Frames June 23, 2021
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A group of phycotic teenage girls who love the same thing.
"Why is she screaming about Jennifer Lawrence?"
"Because she's a fangirl"
"Ohhh"
by Shadowsocieties May 9, 2014
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So you might be asking, what the hells a fangirl, your a fangirl if you are a gal, or guy, (I didn't make up the rules) Who is so super devoted to a book band show or movie, that it makes you just want to curl up and cry, spend hours on the internet despretly trying to get, a spoiler, that can put your mind at ease, you tweet the author everyday, even if its just to say, dear god please do not kill my otp. And john green you were so wrong when you said it would be okay, cause fandoms ruin your life but in such a wonderfull way, And now you may be thinking, o my gods, I just cant even, im not sure if im ready for this life, but there are tons of others, who share your enthusiasm, so embrace your feels cause your in for a bumpy ride.... ( All credit goes to beth Crowley)
Fangirl 1: Oh My Gods, Leo is SOOOOOO Hot!

Fangirl 2: Jason is better! - Is searching the internet.- NO, IT SAYS HERE JASON DIES! -Searches internet more- I NEED A SPOILER TO EASE MY MIND, HE CANT DIE!- Finds a spoiler that puts mind at ease.- OHHHHH Ok he gets re alived. im all better now.

Example 2

Random kid: the Percy Jackson Movies were GREAT!

Fangirl: *flys out of sky with the mark of Athena hard cover and hits them with it*

Random Kid:*is unconsiuous from the hit*

Fangirl : NO THEY WERENT
by LEOVALDEZ<3 September 21, 2015
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a girl who is obsessed with their fav band member(s) and who will retweet, like, follow, and stalk their celeb. They could be shy once you get to know them but when you DO get to know them.... they're CRAZY!! so run for your life
Jessica: I don't want to be friends with Alexia

Brooke: why? isn't she quiet?
Jessica: ON THE OUTSIDE! BUT ONCE SHE INVITED ME OVER AND SHE HAD POSTERS OF 2D ON HER WALL!
Alexia: It's actually 1D

Jessica: she is a total fangirl
by asdfghjklkjhgfdsa101 June 28, 2015
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