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.

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?"

fb by Xmariah6 February 4, 2015

FB 

Short for Fuck Boy.

Jake is such an FB.

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.

FB 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!

fb by La-Who? June 6, 2007

FB 

Future Bae

Your My Future Bae (FB)

FB by KTDTv Nation February 26, 2021

fb 

A common acronym for

1. "fucking bitch"; usually used as a curse/exclamation. Sometimes used as a hashtag by users on Twitter, www.twitter.com

2. Social networking site Facebook, www.facebook.com

Rob: "Ugh, it's raining..yet again. #fb"
Ted: "Stubbed my toe on the corner of my desk >:( #fb"

Rob: "Hey man, are you on fb? You should add me."
Ted: "Whoa, hey, did you see Rob's profile pic on fb?"

fb by aouttr May 5, 2010