A scattergun is a gun that shoots a lot of small, round pieces of metal at the same time.
A scattergun can make people think of hunting or shooting sports.
Examples:
The hunter used a scattergun to shoot the ducks.
I heard the scattergun go off in the distance.
He cleaned his scattergun after the hunt.
The scattergun is very loud!
The scattergun can shoot a lot of things at once.
The scattergun is a very powerful weapon.