ferret
A tradesman who sells goods to young unthrift heirs, at excessive rates, and then continually duns them for the debt. To ferret; to search out or expel any one from his hiding-place, as a ferret drives out rabbits; also to cheat. Ferret-eyed; red-eyed: ferrets have red eyes.
–From the 1811 Dictionary of the Vulgar Tongue.
