Clean way of saying "masturbating and watching porn." The tense of "eating" can change depending on context.
Since I wasn't invited to any parties Friday night, I ended up staying home eating mashed potatoes.
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.
"A mash up". Someone who is insane, crazy, or just not quite there.
That fool over there, he's a mash up.
The art of ejaculating inside of someone and proceeding to shit inside of them (preferably wetly). The colors are reversed.
Please uncle Mike… no more backwards mashed potatoes.
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
Something that only the real nonce people eat
Josh the pedo boy loves cheesy mash