Being beyond fucked up, on any substance, usually for an extended length of time. Those who "get scummy" literally turn into a potato.
by Furious furniture January 9, 2017
When one ejaculates, but immediately prior to doing so, pulls their underwear and undergarments over their genital area, resulting in the cumshot being contained, but having a huge, obvious cumshot staining the crotch of the person.
Person A: "You see Person C lately? I can't believe it, they had a Scummy Cummy dead and centre."
Person B: "Holy shit, how big was it?"
Person A: "Looked like they pissed themselves, they must've done it in a hurry."
Person B: "Holy shit, how big was it?"
Person A: "Looked like they pissed themselves, they must've done it in a hurry."
by asdfasgadfg February 27, 2021
by Spoogs August 31, 2018