A fork of Rural Dictionary
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"
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.