FB

Fuck Buddy. A person who are having casual sex with on a regular basis, but are not involved in a romantic relationship with.

We aren't a couple, she's just my fb.

by Asher April 13, 2005

fb

Fb is an acronym used on social media sites such as instagram meaning " Follow Back".

*follows Kim on ig and comments on a pic*
"Fb?"

by Xmariah6 February 4, 2015

#fb

Twitter hashtag for posting your tweets to facebook. An app on facebook, selective tweets, will post every tweet with the hashtag "#fb" to your facebook wall as well as twitter. Any tweet you post without "#fb" will not be posted to your facebook wall, only to twitter.

I want this tweet posted to twitter and facebook. #fb

I want this tweet posted only on twitter.

by twittered January 4, 2012

FB

Short for Fuck Boy.

Jake is such an FB.

by Dustyturtle January 9, 2015

FB

1: Facebook
2: Fucking Bitch
3: Fuck Buddy
4: Finger Bang

1: Hey did you see Alex's profile on fb??
2: Who does that fb think she is?
3: That chick over there is my fb.
4: My husband fb me before we went to sleep.

by MehRoxz July 15, 2011

fb

The shorthand term for Facebook.

Jojo has just taken a picture of Maddie

Maddie looks at the photo:

Maddie: OMG! FB! FB!
Jojo: Totally, i'll add it!

by La-Who? June 6, 2007

FB

Future Bae

Your My Future Bae (FB)

by KTDTv Nation February 26, 2021