Dunkaroo

A dunkaroo is a sexual maneuver whereby a male of the species holds a woman of the species firmly by the hair. The male then penetrates said female anally for a undetermined period of time. The male then, while keeping control of the hair (this is important), scampers around the side of the women and places his penis in the woman's mouth while making a stirring motion with his hips. This is the dunkaroo.

"Do you see that filthy hosebeast over there by the keg? Last month at the Halloween party I dressed up like a kangaroo and did the dunkaroo on her. She got that booty mouth while dressed like a slutty Tinkerbell."

Dunkarooing

When you lubricate one's anus and quickly insert or "dunk" your testicles into his/her rectum.

Ex.
"Oh, I'm gonna be Dunkarooing you so much tonight."

Dallas Dunkaroo

When you shit into a pocket pussy and masturbate with it

Josh Peters lubricated his PP with a good old Dallas Dunkaroo