D defs.my
Entry 2 senses Webster, 1913

Jackanapes

· Jack·a·napes · IPA /ˈd͡ʒækəˌneɪps/
01 n. A monkey; an ape.
  1. 1.
    A monkey; an ape.
  2. 2.
    A coxcomb; an impertinent or conceited fellow.
    “A young upstart jackanapes.” Arbuthnot.