Fucking my family paradox, The theory you can never get too close to someone who is having sex with a member of your family because of the expected akwardness. Also can be used as fucking my sister paradox or fucking my mother paradox.
Friend 1: My Sister's boyfriend keeps trying to be my best friend.
Friend 2: So what's wrong with that?
Friend 1: FMF paradox man, it's too awkward.
Friend 2: So what's wrong with that?
Friend 1: FMF paradox man, it's too awkward.
by Billy Mcgee February 21, 2014
 Get the FMF Paradoxmug.
Get the FMF Paradoxmug. For motherfucker's sake
by why she is taken! February 21, 2021
 Get the Fmfsmug.
Get the Fmfsmug. by Poop-brains November 8, 2020
 Get the FMFmug.
Get the FMFmug. 