A pocket picker is someone who steals items from another person's pocket or purse without their knowledge or consent. Synonyms for pocket picker include pickpocket, thief, robber, mugger, snatcher, and pilferer. Pickpocket is the most common synonym for pocket picker, as it refers specifically to someone who steals from pockets. Thief is a broader term that can refer to anyone who steals any type of property. Robber and mugger specifically refer to someone who uses force or violence to steal from their victim. Snatcher is a synonym that refers to someone who grabs an item quickly and runs away. Pilferer is a more casual term for a thief who steals in small amounts.