Top Definition
any vehicle with a diesel engine that has a modified fuel system allowing it to be run on vegetable oil. often driven by hippies and environmentalists.
it's cheap and easy to make your own veggie bus. a diesel engine can be run on any combination of fuels including used french fry grease, lard, paraffin, motor oil, ethanol and biodiesel, the latter being the best if you want your engine to last long.
by Eugene Romi September 04, 2006

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