An 4-step activity involving two people, a cooler full of ice water and a can full of beer.
Step 1: Dunkaroo Recipient submerges head in cooler of ice water for 10 seconds
Step 2: Dunkaroo Doner slaps Recipient in the face and hands them a beer
Step 3: Dunkaroo Recipient drinks beer, à la shotgun method
Step 4: Scuzz
"Did you see how many Dunkaroos Sasha took last night?"
"My friend Shoshana just arrived with a cooler full of Peebrs. Dunkaroo time fa da boyz"