What is Dunk-a-roo?
1.
The activity consisting of being held upside down submerged in a garbage can full of water for as long as one can hold ones breath. Once one has been put back to the standing position, the person has to bong a beer. its a rush but quite fun. Usually done at frat parties.
Did you see those two hott girls just do that dunk-a-roo? They are fucking awsome!
See