A large pick up truck capable of slamming through smaller vehicles or pushing them out of the way. Usually four wheel drive.
My Uncle Tits has a slam wagon. He ran through two Saturns and a Jeep with it.
by JPizzle123 September 29, 2010
Top Definition
1. A girl who is too ugly, or large to be referred to as a slam piece.

2. One step down from slam piece on the ladder of objectifying girls. One step above a grundle troll.
Bro 1: "Did you see that slam piece that Derek hooked up with the other night?" "

Bro 2: "That wasn't a slam piece. That was a slam wagon. Imported from Detroit."
by Brolocinco May 30, 2011

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