i'm goin down down baby, yo' street in a range rover  street sweeper baby, cocked ready to let it go       - nelly
a gun, called a street sweeper because it cleans the streets of those who are disliked or unlucky
"i'm goin down down baby, yo' street in a range rover  street sweeper baby, cocked ready to let it go       - nelly" What is the definition of "street sweeper"?