when one ejaculates in another's anus, and then they fist the load as far in as possible.
anal intercourse with johnny is so good, especially when he gives me mashed potatoes
by jeremyspearout January 11, 2007
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When your grandma gives you a blowjob while you take out the trash and her tits sag so low that your dick falls in her ass.
My Mashed Potatoes were mashed good
by i suck dicks mmmmmmm tasty December 27, 2008
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When a male mashes his full genitalia into a females vagina, completely enveloping it. We're talking penis and balls all in there.
Man, last night I mashed potatoed your mom and I couldn't get it back out!
by IllestStreetBrawla November 25, 2006
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Refers to the state of mind one enters upon smoking wayyyy to much weed.

A euphoric feeling that warms the soul, induced strickly by some fuzzy haze, or fluffy diesel.
"Shitttt man I smoked so much last night I was like a lump of mashed potatoes!"

"Mashed Potatoes anyone??"

"Yooo I cant feel my legs...im mashed potatoes right now son!"
by Jrockwhc76 May 13, 2009
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Cum basically. It came about when Lindsay was makeing a certain hand motion when saying the words "Mashed Potatoes" since that moment it has been witnessed and understood but many of Massapequa's youth and a Mall security guard.
Brittney-You eat mashed potatoes today Christa?
Christa-No but maybe next tuesday. You have any lately?
Britteney-*Laughing*
by The Onion February 13, 2005
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The act of defecating onto one's chest, then dipping one's ballsack into the feces, leaving a crater. Then peeing into said crater. Creating a mashed potatoes-with-some-gravy inspired look.
My girlfriend is so weird, she let me do Mashed Potatoes to her.

My girl was pissing me off so I gave her some Mashed Potatoes to wake up to.
by Lienad15 March 12, 2014
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an exceptionally heavy ejaculate, generally after prolonged abstinence from sexual activities
The next girl I fuck is gonna get a face full of mashed potatoes
by Shiesty McNasty December 24, 2009
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