When one vertically climbs up a piss stall using his hands and legs with his junk hanging out, and pee pee as best as he can towards the direction of the yellow bowl. He would then release the grease with a very Asian karate chop sound, thus completing the Ninja Piss.
"dude, i heard the bathroom stalls are fucked"
"oh hell yeah nigga, Jimmy totally ninja pissed that shit like a pro asian G"
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