What is Gravy Butt?
1.
What you are left with after shitting your pants while clothed, with no restroom or relief in sight.
Glenny: "Dude, do you smell that ransid stench"
Crane: "Yeah, that F-Tard's gravy butt is wreaking up this whole elevator"
Glenny: "No shit, you can even see the skid stain"
See