A name given to a generally friendly guy. If you ever meet a Joelio, you will probably become fast friends. A person named Joelio will most likely be bisexual. He might also get stiff over antiques and small amounts of silver.
Guy 1: Is that chair an antique?
Guy 2: I don't know, does Joelio have a stiffy?
Guy 1: Yep.
Guy 2: Must be an antique then.