If you're talking about 'Tombstone' - it was called a 'street howitzer'...
'Street Sweeper' came about closer to WWI, along with 'Trench Broom' - also including the Thompson SMG in that sobriquet.
The short-barrelled shotgun had a number of names and a myriad of uses - pretty much none for a regular citizen, but since 'Tombstone' came out, every C&WAS scenario includes them.
Scouts Out!