1. Someone who is riding in the front passenger side of a vehicle.
2. See scrub.
3. Someone who is always riding in the front passenger side of a vehicle.
4. Someone who was too stupid to pass their driving test and is always stuck riding in the front passenger side of a vehicle because they can't get their license.
5. A loser riding in the front passenger side of a vehicle who is trying to cop an attitude.
Some lame-ass shotgunner was tryin' to holla at me.
When pulling over a driver for acting like an idiot, you start yelling at the driver, and then:
The people who use a shotgun in call of duty. They usually use shotguns because they can't get a kill with a normal weapon. Most people rage when they get killed by a shotgunner even other shotgunners. They almost never aim down the site because a shotgun will spray out a lot of pellets and kill people who aren't in the line of fire.