Zany
/ˈzeɪni/
noun
A fool or clown, especially one whose business on the stage is to imitate foolishly the actions of the principal clown.
verb
To mimic foolishly.
adjective
Unusual and awkward in a funny, comical manner; outlandish; clownish.
Ludicrously or incongruously comical.
Synonyms: wacky