The phrase "shotgun" is commonly used to refer to sitting in the front seat of a car next to the driver. It means you called dibs or claimed that seat before anyone else. Full definition
The elephant in the living room here regarding family play is that these characters may not be shooting bullets, but they are shooting guns at each other. (engagedfamilygaming.com)
By taking a step back, the game jumps forward because it makes firing a virtual gun fun again by stripping away all of the unnecessary «realism» of shooting a gun. (darkstation.com)
He said you're not gonna get results if you don't shoot the gun. (sbnation.com)