The girl that your best friend is dating, who is obligated to be a total bitch because of some subliminary life cliche. She will be clingy, possessive, and controlling, giving you little to no bro-time.

You and other friends will be forced to accept her into your social circle, but will talk mass loads of shit on her whenever you get the chance.
Your friend and your best friend's girlfriend-

"Hey bro, you still drinking with us this weekend?"

"Can't dude, I have to hang out with Carly."

"But broski, you've hung out with her everyday for six days now- Whatever, just bring her with."

"She doesn't want too, dude, sorry."
by Austavious Rex March 30, 2010
Get the Your best friend's girlfriend mug.
when you and your female friend exhibit romantic feelings and interactions but have mutually decided not to date. this different from when you're with a fuckboy and he doesn't answer the "what are we?" question. in this situation, you both know what you are: friends that really like each other but don't want to take any more steps.
person a: are you and emily dating?
person b: naw, she's just my girlfriend friend
by sassy gay dork February 26, 2017
Get the girlfriend friend mug.
A girl who beings to go out with 1 of your friends and is a lil bietch so steals your friend from u.
WOw! WHAT A FSGF, NOW IM LONELY< THAT WHORE
by Snoop April 20, 2005
Get the FSGF (friend stealing girlfriend) mug.
Protective lesbian energy that one gives to a friend about their relationship. As if they were dating but they’re just friends.
My roommate went off on me about talking to a girl and gave off girlfriend friend energy.
by GM Sunshine November 14, 2022
Get the Girlfriend Friend Energy mug.