The act of using a meat of choice and violently sticking it up the bartender’s anus
Tyrone: Oh no! Hes doing the Filthy Fred on the bartender!
The act of inserting meat of your choice(preferably chicken) up the nearest staff member.
Worker 1: Oh no Greg is at it again.
Worker 2: Is it the Filthy Fred?
Worker 3: Dats hot.
Teacher 1: SAM!
Sam: No!