Definition of monkey-cup:
(n) :
(strictly) A member of the clade Simiiformes other than those in the clade Hominoidea containing apes, generally (but not universally) distinguished by small size, tails, and cheek pouches.
(n) :
(cladistically) Any simian including humans.
(n) :
(loosely, sometimes proscribed) Any simian primate other than hominids, any monkey or ape.
(n) :
(informal, sometimes offensive) A naughty or mischievous person, especially a child.
(n) :
(figurative, generally derogatory) A human considered to resemble monkeys in some way, including:
(n) :
(derogatory) Synonym of idiot: a person of minimal intelligence.