Coloquialism, common in Australia, used as a slang reference to anal sex. It is a play on the slang term for New Zealanders, ie "kiwis" (thus a "kiwi fruit" would be a homosexual). The term is used frequently to refer in a literal sense to unwanted anal sex, in fact having the actual meaning of some untoward event or reprisal being invoked on the target of the speaker.
"Oi, mate. That may pass for manners in Buttfuck Iraq, but if you harrass that lady any further I'm gonna take this can of Fosters and give you a kiwi enema with it."
by DrCruel November 20, 2006