what exactly is a Crook?

Answer 1

crook (noun)
-An implement or tool, such as a bishop's crosier or a shepherd's staff, with a bent or curved part.
-A part that is curved or bent like a hook.
-A curve or bend; a turn: a crook in the path.
Informal.
-One who makes a living by dishonest methods.

Answer 2

Someone who steals

Answer 3

a robber