The term SPEEDEER'S NEMISIS is a crossword solution for the three letter word COP. The term COP is an abbreviation for 'Constable On Patrol' and is used to refer to a police officer. It is also used as a verb to describe the act of stopping someone or something. In this context, SPEEDEER'S NEMISIS would refer to a police officer who is tasked with stopping Speedeer, a character in a story or game.