A term used to describe a male who is obesssed with himself and thinks he is better than everyone else. He is usually white trash, ugly, and fat. Also tends to have a small penis.
Damn, I just got hit on by a Gary Dunbar. Wish he would go back to his trailer park.
When you take a "boy's trip" or vacation with just men, and wind up taking turns preforming sexual favors to various members of the group in the privacy of a hotel.
That Vegas trip turned into a gary holliday after Marc sexually assualted that stripper the first night.