Definitions by shiksadulcinea

FBS 

Abbreviation for "fucking be serious". Used to denote either that it is now time to become serious or that something is meant to be taken literally.

1: Okay, FBS, we really have to get this shit done. No more messing around.

2: Like, FBS, we're in love.

FBS by shiksadulcinea August 16, 2008