bb is short for bottom bitch, or a butt buddy (someone you are so close with that its almost gay). This can only be achieved by very close friends.
by Fatniss Neverlean March 29, 2015

Andy: wow look at BB Bradderz
Matt: God she has a large round arse
Haytham: I would so grab that BB with both hands.
Matt: God she has a large round arse
Haytham: I would so grab that BB with both hands.
by Very lazy garlic November 9, 2010

by Flash[ZD] May 8, 2009

bb is definitely someone's baby or will be someone's baby. A bb is funny, pretty asf attractive but most of all, a BI TCH
A bb has also already found he's/her soulmate
by Me:) May 30, 2020

Short for “Bitch Behavior”. Someone who isn’t up for anything or down to have fun. Wants to stay in for the night.
David: Ayo Meeks whats Johnny doin tonight?
Meeks: Idk man he’s on some BB tonight
David: say that. We’ll go on without him
Meeks: Idk man he’s on some BB tonight
David: say that. We’ll go on without him
by Meeks Mill February 14, 2020
