[FG] 

Fucking gay, often associated with "fermi"

FG is so gay

[FG] by A1GangGang March 20, 2017

FG 

Fucking Genius. A title awarded to those whom are intelligent and wish to place emphasis on their natural aptitude in matters of the mind.

Kumar: Dunahee is a FG, did you hear how well he did on his test?

Felipe: Yes, and I heard he didn't even study. I wish I was a FG.

FG by Dresmeister April 10, 2010

FG 

FG stands for fuckgirl. It's a shorter form and sucres way of saying it. A fuckgirl is a girl who acts like a fuckboy. She strings them along and uses other guys when shes already maybe dating someone else. She loves getting attention from many guys. Its the type of girl who thinks shes hot and the shit and attempts to show it without trying but it is obvious that she is. She's particularly easy and will go for any guy that gets thrown at her.

Ryan: bro, she's texting over 10 guys..
Zack: she's definetly a FG..

FG by Rushhour10 October 29, 2015

FG 

Fangirl, usually a young girl obsessed with boybands.
Most notable in the fangirls of KPOP groups

A: Jessica is so obsessed with EXO and cute Korean stars
B: What an FG

FG by cheese374 April 17, 2014

Fg 

Fat girl, could say field goal, foxy grand ma, ect. Used by guys to keep the fattys from knowing what they are talking about.

Kyle: Dude check out them Fgs, Ronnie, they comming for you.
Ronnie: Shit man, i hate them fruity gnomes.

Fg by Seagraves February 17, 2007

Fg 

Fg literally means "Friendly girl", it can be used in a variety of situations where one may want to talk about a girl but without actually referring to her directly, so the term fg may be used. Fg also has a double meaning now this cant be defined for it is for you to discover... the antonym (opposite) of an fg is called a "ufg" which means un-friendly girl (this has a double meaning as well)

Example 1

Guy 1: Woah! That girl over there is an fg!

Guy 2: Yeah man! Can't lie!

or

Guy 1: Do you think that girl is an fg?

Guy 2: Well sorta... Could be better

Example 2

Guy 1: Awww wtf?! That girl over there is a ufg!

Guy 2: I know man, she disgusts me!

or

Guy 1: Is that girl over there an fg?

Guy 2: Nah! Shes more like a ufg.

Fg by AceW3RM November 15, 2011

FG 

a faker ganger; not a real chollo or gangbanger. he pretends like he's a hardass when he isn't

FG- I'll feed him to my dogs I got from Satan's garage sale.

*shows dogs*

Man- Those are chihuahuas! You're just an FG!

FG by BOTDFbitchh November 24, 2010