marmoset

noun3

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. •
   (no longer used) A hideous figure; a grotesque.
3. •
   (offensive, no longer used) An unappealing or foolish man.