When you think you have maneuvered yourself into a superior position (just made awesome FB post, or about to play an awesome card hand, etc.), then someone spectacularly supersedes you; usually used as an exclamation.
by mbk3357 August 20, 2015
Worse than getting schooled. Metaphorically speaking, you've been rearranging the kitchen magnets and snacking on Chef Boyardee while your babysitter was smoking blunts and hooking up with a supermodel.
The expression could be used in almost any situation, but it always ends with, "damn son, you just got BABYSAT"
by DJ Gavin Holland June 26, 2007