The Collaborative International Dictionary of English v.0.48:
Buffoonish \Buf*foon"ish\, a. Like a buffoon; consisting in low jests or gestures. --Blair. [1913 Webster]WordNet (r) 3.0 (2006):
buffoonish adj 1: like a clown; "a buffoonish walk"; "a clownish face"; "a zany sense of humor" [syn: buffoonish, clownish, clownlike, zany]