A fork of Rural Dictionary
Short for mother fucker. Can also be said as mf.
Boy one: HEY! THAT MF'ER TOOK MY MINECRAFT Boy two: Just let it go dude
Military abbreviation for "My Friend."
Sgt. Connelly was one courageous MF'er.
Mute Forever. Used in elite criminal organizations to show that the wearer is never going to talk about anything with someone outside their organization.
Tiny,"Hey Bob I think that Tom snitched on us." Bob," Naw Tom is a stand up MF'er"