Piss in your pocket???

Hi,

I am writing from Australia. We have a very odd expression here; Piss in your pocket. It means to brown-nose, favour, flatter or suck up to.

There are two ways to use it:

"I don't want to piss in your pocket, but that was fantastic!"

"I'm going to have to piss in your pocket, mate, that was great."

I think this is only an Australian term.

Hope you have some luck with it,

Claire

Ok, it doesnt sound flattering thou!! So what is its origine?