Definitions by Fictitious Plumber

Left-handed monkey wrench 

A fictitious tool. A monkey wrench has no left-handed or right-handed versions. Often used as a practical joke, i.e. telling someone to find a left-handed monkey wrench for you.

"Hey, will you go find me a left-handed monkey wrench? I need to fix this pipe."

Left-handed monkey wrench by Fictitious Plumber January 30, 2012