GrundleButter Keelhaul 

A punishment in which an unlucky fellow is strapped to a pole or board and then held up by several men and swiped back and forth under an unwashed obese man's undercarriage, from the top of the crack to the back of the sack, marinating in the unholy 'butter' found therein.

"Jon said he doesn't like Star Wars, so he has been sentenced to a GrundleButter Keelhaul"

GrundleButter Keelhaul by PhatSphoincter October 3, 2025