Top Definition
An automobile mechanic who incorrectly attempts to improve a poor running engine by repeatedly revving it up attempting to blow out carbon build up on the spark plugs, rather than performing a proper tune-up with new spark plugs.
Anyone who revs up an automobile engine neutral gear over and over again with the hood up attempting to improve it attributes is know as rev-tuning an engine. A rev-tune is no substitute for a tune-up with new spark plugs.
by MD Simon November 02, 2008

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