top tanker 

The act of shitting in the top tank of a toilet (usually not your own)

Jeramy Russell gave the Shell station a top tanker after dude said we were too drunk to buy beer. When he was done, I pulled the ol' dry docker.

top tanker by larry the lesbian August 11, 2017

Topwanker

Alternative phrase: "wankadile.

Somebody who is a close mate.
Somebody you love as a marra.

Oi Daniel, your my topwanker you know that.

Topwanker by Viperian topwanker February 1, 2023