stands for bad motherfucker. popularized by Samuel L. Jackson in the movie Pulp Fiction. I also heard you can see it on Mace Windu's (also played by Samuel L. Jackson) lightsaber in the star wars movies.
by David Winokur May 18, 2005
BMFS is the GOAT.
by Cosmicgirlismadeofstarstuff September 9, 2019
by Mer Shea August 13, 2005
by RatchetDrama Queen February 15, 2015