wrench
n.β Β«Adams already had experience fixing bicycles because he did it so much on his own. Soon after completing the bicycle school, DNS closed the lab where Adams was stationed. He decided to became a bike mechanic orβas they call them in the bicycle industryβa βwrenchβ at a bike shop in Berkeley, Calif.Β» ββEntrepreneur loves being a βwrench'” by Caleb Sheaffer Citizens Voice (Wilkes-Barre, Pennsylvania) Mar. 9, 2008. (source: Double-Tongued Dictionary)