monkey (esp. a gibbon)

hand of the puppeteer (puppet theatre)

kappa

Archaic

menstrual period

golden snub-nosed monkey (Rhinopithecus roxellana)

Rare term

monkey

trying to reach above one's station and failing; trying to accomplish something beyond one's abilities and failing; monkey catching (a reflection of) the moon (in the water)

Idiomatic expression

to only look the part (but otherwise be wholly unsuited for it); a monkey wearing a crown