Assless chaps

[Tina]

A popular pair of leather pants that motorcyclists wear. As the name says, they are assless, making it easier to advertise at biker bars.

[Couch Potatoe]

A type of leather pants (usually worn by bikers) that are little hit and miss. Or rather, miss and hit. Theyre missing the ass, which allows that ass to be hit.

[Rihanna]

a brief escape hatch of someones ass in the rear end of there trousers orpants etc