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jack ass of all trades 

a person who thinks he knows it all and is not swayed by the facts.
Regardless of the truth, Larry is a jack ass of all trades.

jack of all tirades 

A person who feels the need to vehemently complain about anything and everything.
I can't hang out with Brian anymore, he's become the jack of all tirades, nothing but negativity, a real bummer.
jack of all tirades by Scott Freah September 22, 2006