Stands for one of the following forms of motherfucker: motherfucker, motherfucking, motherfuck. The form that is used depends on the context of the situation.
by TurnM3Up December 10, 2019

That MF Ugly!
by StraightGirl6060 September 05, 2018

by Falken January 17, 2003

by Margaret<3 January 27, 2009

by MadFishMF November 04, 2020
