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Verb: to go at it, either dry humping or having sex.

Synonyms: bone down, grind, hump, makin' whoopy.
Boy 1: "Where the hell you goin?"

Boy 2: "To Sara's house."

Boy 1: "Mmm Hmmm. You gonna go Mack Diesel!"
by DoggyD66 December 31, 2009
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