look up any word, like blumpkin:
 
1.
A REALLY big fucking deal. For when a "big fucking deal" doesn't quite capture the magnitude of the pressing matter at hand.
Senior 1: Dude secondary school reports for college apps are due tomorrow.

Senior 2: BFD
Senior 3: It's a RBFD...
by IDlOT September 30, 2009
 
2.
It's like being "Rick Rolled", except the video is "Friday" by Rebecca Black.
DAMMT!!! >< I got RBFd AGAIN!!!!!! >:(
by PsychoKiller27 April 15, 2011