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
A rabid breed of human female who is obesessed with either a fictional character or an actor. Similar to the breed of fanboy. Fangirls congregate at anime conventions and livejournal. Have been known to glomp, grope, and tackle when encountering said obesessions.
Hugh Jackman: 'ello.
Fangirl: SQUEEEEEE! *immediately attaches to Jackman's leg*
Jackman: Security!
by Sita Snape May 3, 2003
1 - Girls who are fanatical about a particular person, group of people, or idea.
The rock star was flooded with fangirls
by Duncle December 30, 2005
To educate one on how to be a fangirl.

Introduce someone to the world of fangirls. #thefeels
Girl 1: OMC I LOVE SH AND JW. THEY'RE MY FAV OTP.
Girl 2: ....What? otp? I don't understand..
Girl 1: You need a fangirlication.
by Sargent Capricorn April 9, 2013
1. something that you are a serious fangirl of, or that makes you have a fangirl moment; very squeesome.

2. The act of being a fangirl.


3. a fangirl moment.
exaple 1- NaruGaara is one of my many fangirlisms.

example 2- My fangirlism never ceases.

example 3- Heh, sorry, I was having a bit of a fangirlism..
by Anette Reeds November 18, 2008
1. A fan of something (female) who is obsessed with the said subject to a certain degree (normally unhealthy).

2. A general term for a female fan of something.

A fangirl is a (female) fan of a character from a movie, anime, video game, etc. or a real life actor or singer. Usually they have an obsession with their "idol" and do various activities to show their love for the said idol. Such activities include ranting about them, making shrines or fanlistings, creating graphics (wallpapers, layouts, etc) that feature the "idol", writing fanfics and making fanart. Some also make plushies or collect posters and other merchandise of their beloved idol.

Usually, members of this label are seen as 1) insane; 2) idiotic; or 3) scary.

However, not all fangirls are like this. Quite a few of them are just an average fan of something, and just call themselves such. But, there are three types of commonly seen fangirls:

1) BELOW AVERAGE FANGIRL

This fangirl is the least likely to cause chaos or mayhem, insult or annoy someone else who is not a fangirl (or boy, if they happen to be male). They admit that they have a slight obsession for something/one, and are mature about it. While they might use smilies (XD, XP, ^_^) and occasionally rant, they try not to go overboard about it.

2. AVERAGE FANGIRL

This fangirl is the most commonly seen fangirl across the Internet, and are generally harmless. They are prone to making shrines, annoying people with their "fantasies" of meeting or marrying their idol, bad grammar, and just being immature about the object of their obsession/affection. Many of these also write fanfics, causing such places as fanfiction.net to be cluttered with stories that could use a good editing and rewriting all together. Another common trait about them is their tendency to rant, be easily insulted, and excessively "glomp", squeal and use chat speak in places where it is not appropriate.

3. ABOVE AVERAGE FANGIRL

This fangirl is above the previous fangirl, and has thus let her obsession go beyond healthy levels. They tend to rant a lot more than other fangirls, and are more easily to insult or anger if you tell them that their "idol" is just a two-dimensional character, or someone whom they will most likely never meet. Their fantasies go beyond the fantasies of the "average" fangirl, along with all of their other tendencies. These are the fangirls most dislike and tend to stay away from due to their ability to easily annoy others, and their high levels of immaturity.
Below Average Fangirl: "I like Jack Sparrow a lot - he is just such a cool character! Look at the wallpaper I made featuring a picture of him! What do you think? :D"

Average Fangirl: "I <3 Jack Sparrow! *glomps him* He's so awesome! OMG, you all should like him too! XD"

Above Average Fangirl: "I luv Jack Sparrow sooooo much! We r going 2 get married! I LUV HIM SOOOO MUCH! Stay away! He is mine!"
by LupinDrake May 29, 2007
v. 1. the reaction a fangirl has to any mention or sighting of the object of her "affection". These reactions include shortness of breath, fainting, highpitched noises, shaking, fierce head shaking as if in the midst of a seizure, wet panties, endless blog posts, etc.

2. a gathering of two or more fangirls in which they proceed to waste endless amounts of time ogling, discussing/arguing, stalking, etc. the object of their "affection"

See also:
fangirl, glomp, squee, groupie
1. I admit it, I was fangirling all through Alexander and probably made an ass of myself but, omg, guys in skirts are sooooooo hot!

LoL, did you start fangirling the minute you found out the title of the next Harry Potter book?

2. Yeah, I stopped by Aisha's yesterday for a bit of fangirling before I headed home.

Who knew the Halloween party was going to turn into one huge fangirling session?!?!
by Frenchie November 28, 2004