Green’s Dictionary of Slang

arabber n.

a peddler.

1942		H. Footner Maryland Main 8: Every ‘ayraba’ (huckster) dreams of the day when he can purchase a diminutive wagon and a pony to pull it [DARE].
1951		‘Miscellany’ in AS XXVI 71/2: In her early youth South Baltimore hucksters were called arabbers as well as arabs.
1968		in DARE questionaire.
1989		R.L. Freeman Arabbers of Baltimore ix: Forty years ago, I interrupted my career as a fourth-generation arabber.
1997		Simon & Burns Corner (1998) 321: One of them Ay-rabbers from up on Bruce Street went down there to cop.