Filthy Grimmy
The act of attempting to push the previous occupant of a public bathroom stall back into the lavatory in order to give them a rimjob.
Guy 1: Dude did you hear about what that big bearded guy was doing in the club last night?
Guy 2: Yea man I heard he actually pulled off a filthy grimmy...
Guy 2: Yea man I heard he actually pulled off a filthy grimmy...