a cloudburst of bad judgment, usually by someone well-known.
The epic clownburst of 2009 had to be Tiger Woods' infidelity which looks like it will cost him his marriage and about $100 mil in yearly endorsements.

But there were other clownbursts of note in 2009, like Governor Mark Sanford hiking the Applachian Trail down in South America, and the Balloon Boy parents trying to gain fame by faking their son's disappearance.
by sesofocala January 04, 2010

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