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1.
Verb. To make a complete idiot of oneself in public. To behave or speak in such a way, or to make a comment or express an opinion that is so profoundly witless, senseless and obtuse, that you have forever after defined yourself as a person of comical value only. Never to be taken seriously again. Of worth only as an object of ridicule and derision.
American academic, Paul Carlos, recently beclowned himself by claiming, in effect, that nations that sought to defend themselves from terrorist attacks by killing those responsible for planning the attacks or building weapons for the attacks, including nuclear weapons, were gulty of murder. Former Reagan staffer Doug Bandow has also beclowned himself by claiming that the Bali terrorist bombing was in response to Australia's Iraq involvement. Even though the Bali bombing was before the Iraq war.
by geofff February 22, 2007
 
2.
To argue loudly about things one does not understand.
Bandow has previously beclowned himself on matters Australian.

or

Paul Campos has beclowned himself.
by samajaman February 21, 2007