Backwards Kanga 

Australian slang, given to the act of sitting on ones toilet backwards and defecating in such away that it smears down the side of the bowl and generally stays beyond the flush. When doing a backwards kanga, one tends to look like a kangaroo standing.

Trevor was at the party and did a really messy backwards kanga in Joe’s facility.

Backwards Kanga by !!!Pepper December 11, 2003

Backwards kangaroo 

The art off going to a mates house and sitting reverse on the toilet with your Hands on the cistern in a kangaroo pose, pooing leaving a crocodile slide.

Eww Jeff the dirty prick must have done a backwards kangaroo in here there's a dirty big croc slide in the loo!!!

Backwards kangaroo by orsm1 August 31, 2014