Source : Webster's Revised Unabridged Dictionary (1913)

Clownish \Clown"ish\, a.
   Of or resembling a clown, or characteristic of a clown;
   ungainly; awkward. ``Clownish hands.'' --Spenser. ``Clownish
   mimic.'' --Prior. -- {Clown"ish*ly}, adv.

   Syn: Coarse; rough; clumsy; awkward; ungainly; rude; uncivil;
        ill-bred; boorish; rustic; untutored.

Source : WordNet®

clownish
     adj : like a clown; "a buffoonish walk"; "a clownish face"; "a
           zany sense of humor" [syn: {buffoonish}, {clowlike}, {zany}]