marmoset

noun

Etymology: Borrowed from Middle French marmouset (“a gargoyle; a small child”), probably from marmouser (“to mumble”), of imitative origin.

1. Any small monkey, now specifically a Central and South American monkey of the genera Callithrix, Mico, Cebuella, and Callibella, with claws instead of nails, and a rather primitive layout.
2. A hideous figure; a grotesque.
3. An unappealing or foolish man.