a bad or unenjoyable thing, event, or smell; derived from the powdery film left under your fingernail after having scratched the upper part of your buttcrack and not having showered for a while.
"Man, that last game of Mario Kart was poo-poo cheese! I only got hit with red shells the whole time!"

or

"Oh my god, that smells like absolute poo-poo cheese."

or

"I'm playing insert game here like ass today."
"Yeah man, you're poo-poo cheese right now."
by poopoochzman September 29, 2021
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