Buffoon

Noun

 * 1) One who acts in a silly or ridiculous fashion; a clown or fool.
 * 2)  An unintentionally ridiculous person.

Verb

 * 1) To behave like a buffoon

Adjectives for Buffoon
enormous; gluttonous; ordinary; stammering; pantomime.

Derived terms

 * buffoonery

Thesaurus
hoodlum, hooligan, ignoramus, imp, jack-pudding, jackass, jester, joker, jokester, knave, little devil, little monkey, little rascal, lunatic, merry-andrew, milksop, minx, mischief, mischief-maker, mooncalf, motley, motley fool, perfect fool, pickle-herring, pixie, practical joker, prankster, puck, rapscallion, rascal, rogue, rowdy, ruffian, scamp, scapegrace, schmuck, softhead, sop, stupid ass, tomfool, wag, zany, ass, bad boy, booger, born fool, buffo, bugger, clown, cutup, devil, doodle, egregious ass, elf, enfant terrible, figure of fun, fool, funmaker, harlequin, hood,

Etymology
From bouffon:, from  buffone:, from buffare: