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Noun, An incredibly attractive man who will become excited just to be excited. however weird this may make him seem, however, he is sexy enough to make up for being borderline insane.
Girl 1: Like, OMG Hadyn's being SO Weird! Like, why is he so happy?
Girl 2: Who cares? Just look at him! He's such a Yayman!
Girl 1: Yeah, you're right, he's damn sexy!
by Engel34 July 26, 2010
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