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A car, usually belonging to a member of Gen Y, that is designed only to look and sound good. Often they will have stickers advertising Playboy, Playgirl and similar magazines.

Many times a spagwagon owner will engage in the activity of subwoofing or burnouts
"That guy's car is all show"
"Yeah, a real spagwagon"
by Mason R. April 15, 2008
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