Top Definition
noun, pronounced "Spee-Oh"
acronym for Self Proclaimed Expert On Everything
The annoying know-it-all in everyone's social circle, or quasi-member thereof, who always insists on one-upping the person controlling a current conversation with useless factoids or name-dropping to make himself appear more knowledgable or superior to the audience in question. Considers himself (herself) the perfect candidate for "Jeopardy"
Did you hear how many times he interrupted her description of her trip to New York to correct her and brag about his trip to Boston. Dude, he is such a SPEOE
by Chellabella October 12, 2007

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