buffoonish

From buffoon + -ish.

buffoonish (comparative more buffoonish, superlative most buffoonish)

1. Characteristic of a buffoon.
   • 2009, Chika Unigwe, On Black Sisters’ Street, Vintage (2010), pages 107-108:

     Sisi once joked that he was a spy, drawing laughter from the rest because Segun with his habitual look of buffoonish imbecility, his mouth constantly hanging open, hands flailing, does not look smart enough to be a spy.