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Noun. General term for a person whose behavior falls on the spectrum between jackass and assclown, usable in settings where profanity might be inappropriate (kids/parents, workplace etc.)

Verb. The act of disrupting some otherwise useful or enjoyable activity by being a clownjack.

Also clownjackery (n.), clownjackerous (adj.), ownjackerously (adv.)
"The movie was good, but some clownjack sitting behind me wouldn't stop talking."

"Bill totally clownjacked our staff meeting this morning."
by Anonymous_clownjack January 24, 2016
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