1. When someone claims to have not heard the proclamation "shotgun" after Shotgun has audibly been declared, and therefore claims to have rights to the shotgun seat.
2. That guy who always says that shotgun is his, regardless of if he had it last or if someone has already called shotgun.
"Dude... I called shotgun like half a second ago, your shotgun deafness wont work this time, shotgun is MINE!"