zany

(noun) a buffoon in one of the old comedies; imitates others for ludicrous effect.

(noun) a man who is a stupid incompetent fool. Synonyms: fathead, goof, goofball, bozo, jackass, goose, cuckoo, twat.

(adj) ludicrous, foolish. Synonyms: cockamamie, cockamamy, goofy, sappy, silly, wacky, whacky. Examples: "Gave me a cockamamie reason for not going." "Wore a goofy hat." "A silly idea." "Some wacky plan for selling more books."

(adj) like a clown. Synonyms: buffoonish, clownish, clownlike. Examples: "A buffoonish walk." "A clownish face." "A zany sense of humor."