A fork of Rural Dictionary
Refers to a threesome position wherein the girl is in the middle and is getting fucked/fucking two guys at the same time. Usually, this is done by her giving one man a blowjob while getting railed from behind.
Jake: We've tried the MFM position for a while, but Sarah keeps losing rhythm and it ends up being awkward.
Joe: So it's not worth it?
Jake: Guess not.