squirt of piss 

A unit of measurement used to describe very small increments of concern. A tiny amount.

"I don't care one squirt of piss whether you want to go drinking tonight or not. We're going."

squirt of piss by Roger DeCoster September 26, 2005

Not worth two squirts of yabbies piss 

Something that is not worth a great deal

This is Australian slang

Shane Watson's" not worth two squirts of yabbies piss "

Not worth two squirts of yabbies piss by Shitbender December 4, 2013