buffoon Definition

buffoon
noun

usually rather derog:
1. A person who sets out to amuse people with jokes and foolish or comic behaviour, etc; a clown.

Thesaurus: fool, clown, jester, joker, comedian, comic, harlequin, mountebank, scaramouch, wag.
2. Someone who does stupid or foolish things; a fool.

Derivative: buffoonery
noun

Comic or foolish behaviour.
Thesaurus: nonsense, pantomime, silliness, drollery, waggishness, high jinks.

Etymology: 16c: from Italian buffone.