Method One: You directly pash(kiss) a females vagina or males penis while they are urinating hence getting a mouthfull of golden urine.
Method Two: While two people are pashing(kissing) a third person urinates on their heads and into their mouths so that they get the taste of the urine while kissing. This can be done as a prank or for general pleasure.
Method one examples:
"Can I give give you a golden pash?"
"Want to Swallow my piss?"
Method two examples:
"John, come urinate in our mouths"
*urinates on randoms kissing* "Shame! Golden pash!"