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The act inserting leftover mashed potatoes, from Easter dinner, into your partners vagina during her period, then fucking the mashed potatoes out, resembling a rusty snowplow on the front of a beat up '76 Chevy truck.
After a drunken Easter dinner at my moms house, John gave me a Rusty Snowplow.
by KRiver January 08, 2017
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The act of taking the leftover mashed potatoes, from Easter dinner, and inserting them into your partners vagina while she is on her period, then fucking the mashed potatoes out, resembling a rusty snowplow on a beat up '76 Chevy truck....
After my uncle tried to fight my sister at my moms Easter dinner party, John gave me Rusty Snowplow.
by KRiver January 08, 2017
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