asstric bypass 

process needed to remove someones large posterior, similar to gastric bypass

That girl has got one big ghetto booty, she could use an asstric bypass

asstric bypass by tonyhowe May 22, 2008

The Asstric Bypass 

The rapid thrusting of a penis through the buttcrack while avoiding penetration; like a hotdog sliding in and out of a bun. See also Appalachian Mundungus

The Asstric Bypass is a good compromise because I love the booty, but she doesn't want to do anal.

The Asstric Bypass by Thomas Frick March 26, 2008