Keystone Light or Coors Light beer.
I went to a FIJI party last night but all they had was rocky mountain goat piss, I was so pissed, at least give me some Bud!
by PhilZeller October 29, 2006
Noun.

The brand of beer known as Coors Light.
"No way I'm drinking that Rocky Mountain goat piss; pour me a Guinness."
by Frank Carter May 26, 2005
A colloquial term used in reference to the popular sports / soft drink "Mountain Dew".
While hung over in the rocky mountains after a blinder night you may find a need to "get on the goat piss" in retrospect of the previous nights heavy drinking session.

In drinking such green coloured salty flavoured beverages some may comment : "Hard night eh?..On the goat piss I see" in reference to the consumption of the Rocky Mountain Goat Piss.

One would acknowledge this comment with a nod and knowing smile.
by Dj_Teknotimm August 04, 2011

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