Definitions by Billy Radcliffe

butt chug 

Means of imbibing an alcoholic beverage whereby the cleft of another’s buttocks serves as a sluice for the deposition of said refreshment in the recipient’s pie hole.

Such was Milo's ardor for Phyllis, the prospect of a butt chug charmed rather than repulsed.

butt chug by Billy Radcliffe May 19, 2006