3 definitions by ravernousrhino
Stands for "lower bum fat". LBF is the portion of ass-cheek visible when girls wear short denim shorts, otherwise known as denim underwear.
Girl 1: I'm wearing my new denim shorts today!
Girl 2: Yeah, but your LBF is showing, they're more like denim underwear.
Girl 2: Yeah, but your LBF is showing, they're more like denim underwear.
by ravernousrhino August 13, 2012
by ravernousrhino April 27, 2010
by ravernousrhino April 24, 2010