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A person who manages to screw up or break most anything he/she touches. Usually when working on things like cars, carpentry projects, or most anything that involves tools.

The term "wrench tosser" is in reference to someone dropping a wrench into a turning engine or gears and more than likely causing damage.
Don't let Steve work on your car, he'll screw it up worse than it is! He's such a Wrench Tosser.
by RedMistMaker March 07, 2007
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