When you piss in a hot shower and the heat / steam from the water increases the stank to an unbearable level.
Dude i had the worst nuclear piss this morning, it about gassed me out of the shower.

pee nuke piss stink shower
by B.Robert B. May 29, 2013
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Atomic piss, piss that smells worse than shit. Nuclear piss is bright yellow and glows in the dark.
AH!!! watch out he's pissing nuclear piss on us!
by Edd-y June 21, 2005
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