monkey

Any of various tailed primates of the suborder Anthropoidea, including the macaques, baboons, capuchins, and marmosets, and excluding the apes.

A nonhuman ape. Not in scientific use.

One who behaves in a way suggestive of a monkey, as a mischievous child or a mimic.

The iron block of a pile driver.

A person who is mocked, duped, or made to appear a fool.