chunder down under

An Aussie tradition, in which someone vomits in the dunny of a local pub, having spent a morning at Bunnings, consumed 3-4 Aussie tacos , drunk extensive amounts of cheap tap beer and prior to visiting the local rips (strip club).

Mate 1: Where’s James, mate?
Mate 2: Strewth mate, he’s in the fucken dunny having a chunder down under.
Mate 1: Well tell him to hurry up, we’re gonna miss happy hour at Kittens.

Chunder from Down Under

The act of violently vomiting to the point that it causes one to evacuate their bowels at the same time from all of the straining.

To add insult to injury, as I retched into the toilet, a felt a release in my bowels and knew it was the chunder from down under.