meat muzzle Share definition Flag slang reference for a penis. particularly when fellatio is being performed on it. To silence someone by inserting your penis in their mouth.....i.e.; If you don't shut up , I'm gonna whip out the meat muzzle. meat muzzle by John Stahley January 25, 2008 0 0 Get merch Get the meat muzzle mug. Buy Now — $32.95 See more merch