Definitions by soces

MFD 

My fucking dude. This word is used instead of saying something along the lines of, "Dang player, you be spitting that game!" It's much more discrete, and just as effective.

John: You're cute
Rachel: aw thanks <3

James: *pats John on back while passing by* MFD, dawg.

MFD by soces November 25, 2011