clownish

noun

1. Obsolete a peasant or farmer; rustic
2. a clumsy, boorish, or incompetent person
3. a performer who entertains, as in a circus, by antics, jokes, tricks, etc.; jester
4. a person who constantly plays the fool, makes jokes, etc.; buffoon

Etymology: < ? Scand, as in Ice klunni, clumsy person

intransitive verb

1. to perform as a clown
2. to play practical jokes, act silly, etc.