Source : WordNet®

zany
     adj 1: pungent adjectives of disesteem; "gave me a cockamamie
            reason for not going"; "wore a goofy hat"; "a silly
            idea"; "some wacky plan for selling more books" [syn:
            {cockamamie}, {cockamamy}, {goofy}, {sappy}, {silly},
            {wacky}, {whacky}, {unreasonable}]
     2: like a clown; "a buffoonish walk"; "a clownish face"; "a
        zany sense of humor" [syn: {buffoonish}, {clownish}, {clowlike}]
     n 1: a buffoon in one of the old comedies; imitates others for
          ludicrous effect
     2: a man who is a stupid incompetent fool [syn: {fathead}, {goof},
         {goofball}, {bozo}, {jackass}, {goose}, {cuckoo}, {twat}]
     [also: {zaniest}, {zanier}]

zaniest
     See {zany}