1) When Ian pisses in his hand and then rubs it all over your gooch

2) eating the fuckin urinal cake
Straight pissums uh
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Related to the adjective "possin." Pissum is an insult, used on pretty much anyone, but its meaning is 'whores that piss on the streets for fun.'
"Joey is literally a pissum. Do you see what he does at night?"

"Damn all these pissums at this party!"

"Winry, I've gotta divorce you. You're just such a pissum."
by Hieissohot November 20, 2021
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Pissume: when someone acts unaware that they are taking the piss out of you.
Rob: I think you pissume that I believe, you believe what you are saying!
Karen: Nah… you're assuming I’m taking the piss... I’m serious!
by SheBils July 9, 2021
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