Top Definition
A lifted up old 4x4 pick-up truck typically driven by a nirt-nirt, characteristically nirt-nirt trucks are beat-up, rusty, and generally in poor condition but run well because nirt-nirts are always wrenching on them to keep them running through the mud. Nirt-nirts will sometimes sell thier truck to buy a different one with bigger tires. Common descriptions to look for in a listing for a nirt-nirt truck in the classifieds: "Runs Good," "Fast & Fun," and also "Rusty-but-Trusy" See photo.
See photo for nirt-nirt truck.
by charlygordon123456 July 12, 2006

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