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1. The mechanized helicopter flown by Bowser, King of the Koopas.

2. An insult.
1. Damn, I wonder what the Princess was doing when she popped out of Bowser's clownboat.

2. You are such a goddamn clownboat.
by Clownboat May 09, 2004
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a very ass person. much like an assclown, but less vulgar. (example: joeyritsma)
joe ritsma you clownboat.
by dann January 16, 2003
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