Boomerang

(n) the act of going down on oneself, either in hidden , shameful solitary places, such as the parents' guest room, or in front of friends after way too many drinks or pulls from a bong. Oddly, in Australia during the 80's a rash of boomerangs occurred in road rage incidents during the summers.

Also, (v): to make or commit a boomerang.

"Dont know if I can look Jim in the eye after he did that boomerang at the party last night..."