"A mash up". Someone who is insane, crazy, or just not quite there.
That fool over there, he's a mash up.
by jduk23 December 28, 2007
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Something that only the real nonce people eat
Josh the pedo boy loves cheesy mash
by Man of mystery November 3, 2021
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Its the act of stuffing a condom into the lips of a vagina but not really entering.
Joe: Hey, did you actually have sex?
David: No, I was just mash-potatoing her.
by Konoyaro Bakayaro October 16, 2015
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A common situation, experience or every day activity that inexplicably becomes disorganized, confused or grossly fucked up.
We Goat Mashed the other team in gears of war 2
by pureownage54 December 17, 2008
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When during a blowjob the female/male giving the blowjob grabs a hold around the ball sac and crushes the balls.

Often done by people with "cbt" fetishes (check wiki) and also dominatrices.
"You cant believe how great it felt when Linda and I tried something new, she really likes Mashing the potatoes. It really spiced up our marriage and felt great."
by FilledZac November 22, 2019
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When your hungry asf from munchies and stop at the gas station, then proceed to buy out the store.
Yo I was toasted as a strolls an ran to the station to load up a mash pack!
by Titus dyfilid March 12, 2019
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The act of shitting in the shower, then stomping the shit through the shower drain/grate. There then is a rat that eats the shit in the sewer and finds its way to a diner, home, etc... The rat then dies in a potato bin from ingesting whatever nasty garbage you ate and shit out, gets mistaken for a potato, Gets fried and eaten by some fat little kid who looks like gibby from icarly.
Dude I ate a mashed shitatoes today, the rat really looked Like a potato!
by Jersey King October 1, 2020
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