Serio is a way of descibing someone of the male gender who enjoys massive cock. Also if asked what he wants to do on a saturday night he will reply by saying nothing other than watching hockey. Finally in order to be a serio someone must posses the abilities to pick up fat chicks.
My friend is such a serio he watched hockey all yesterday and got a fat chick to blow him.
by lsutigers191 April 27, 2009