Going "Mashed Potatoes" on someone is where you perform the act of pulling down your partner's pants, smearing mashed potatoes (any flavor will do) onto their buttocks, and "motorboating" them between the cheeks. If done correctly there will be mashed potatoes strewn about the area where the act had taken place.
Tom: "Check out that girl in the yoga pants", Earl: "Oh yeah, if I had the chance I'd be going mashed potatoes on her all day"
by Alberto Chodema February 26, 2014
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ussually a sick prank. when one is dared by another employee to cover themselves in mashed potatoes and run naked past there fat potato hungry co worker
timmy dared jimmy to run pasted diane coverd in mashed potatoes knowing he would get a very uncomfortable mashed potato ride
by dlove11201 January 27, 2010
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The action in which one tries to speak and a fully formed sentence is not formed. There are fragments and random words. The person is intently trying to form a sentence and make a point, but the sentence is incomprehensible. There is usually an utter of words and the spew of grunts and/ or the word uhh. This action is usually accompanied by a blank stare or glazed look.
I went to talk to him, but he started mash potato mouthing everywhere. He is real hard to talk to.
by zinna rose January 17, 2012
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An older woman's ass that is rotund and full of cellulite dimples. When they sit down, the ass seems to squish and go all over the place, as if they were sitting on a pile of mashed potatoes.
My sixty-five year old teacher has a mashed potato ass. It is very distracting.
by ihatebuffering March 06, 2011
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The way that a person feels after engaging in sexual intercourse or after having an orgasm. This may include sleepyness, the inability to think straight, and the munchies.
That sex made me feel all mashed potatoes! I can't think straight! Hey, do we have any chex mix?
by ColleenaRae July 12, 2007
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The greatest thing to ever happen to KFC.

Consists of a layer of mashed potatoes, corn, fried chicken bites, and cheese.
MOM: Okay, honey, what do you want for dinner?

ME: KFC mashed potato bowl.

DAD: Come on, can't we go out to eat for once??!
by Moyoya July 07, 2006
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A temporary feeling of retardation that occurs while studying for a promotional process where a plethora of some useful, mostly useless, contradicting BS, is the subject matter.
Rookie: Sir, can we go over fire behavior today?

FF: dafuq is that shit?

Officer to rookie: Stay away from him, he's got mashed potato brains.
by A sad FF April 22, 2017
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