zany

Comical or ludicrous because of incongruity or strangeness.

A comical person given to extravagant or outlandish behavior.

A ludicrous, buffoonish character in old comedies who attempts feebly to mimic the tricks of the clown.

To play the zany to; mimic; imitate apishly.

A comic performer, originating on the Italian stage, whose function it is to make awkward attempts at mimicking the tricks of the professional clown, or the acts of other performers; hence, an apish buffoon in general; a merry-andrew; an amusing fool.