A lady of the night that is a triple amputee.
Dude, I got a great deal on a Dirty Quarter last weekend.
The act of inserting a clean quarter into your partner’s asshole, waiting an hour, and then reaching into the aforementioned anus to retrieve the quarter.
Tom was always the more adventurous one in the group, well known for performing the Dirty Quarter maneuver on his girlfriend on only their second date.