A close relative to the "skippy", a guy smiley is a relentless loser who is overly friendly, overly excitable, painfully annoying, and has an overall goofy appearance. Guy smiley's are almost always completely unaware of their extreme dorkiness. Guy smiley's are often homosexual, or at least raise suspicion to their sexual orientation.
"Remember our music teacher from middle school?"
"Yeah, a complete guy smiley"
(noun): a jerk, an asshole, a real douchebag--an especially handy term to use when you cannot use the epithet you really wish to use (i.e. a jerk, an asshole, a real douchebag) because you are in the presence of children, grandparents, authority figures, what-have-you. Origin: Guy Smiley from Sesame Street, who was NOT an asshole.
Okay, who's the GUY SMILEY who ate the last Ho-Ho?" or "I'm going to be really late because some GUY SMILEY cut me off in traffic so close that my car flipped over and I'm sitting with my 3 year old niece in the car waiting for the cops.