A person who robs. / An animal who robs.

plural of robber

plural of bank robber

One who robs or steals from a bank.

Alternative spelling of cradle robber

(idiomatic, derogatory) A person who marries or becomes romantically involved with someone who is much younger, or who employs or otherwise engages a young person for a purpose inappropriate for his or her age.

Alternative spelling of graverobber

Alternative spelling of robber baron

(historical) In Europe, an aristocrat who charged exorbitant fees or otherwise exacted money from people who journeyed across land or waterways which he controlled.

A game played by schoolchildren in which the "robbers" have to steal "gold" and return it to their "base" without being caught by the "cops" and taken to "jail". When in "jail", "prisoners" can be "freed" by other "robbers".