Definitions by Ron Bush

Australian Boomerang 

The art of taking a poop into another persons anus. Then this person will poop it back into you, thus coming back to you like a boomerang.

Guy 1 " dude, I heard you did an Australian Boomerang last night?"

Guy 2:" Totally, except Greg had diarrhea"

Guy1 : " EWWWW"

Australian Boomerang by Ron Bush April 3, 2008