Green’s Dictionary of Slang

(US) money.

1902		C.L. Cullen More Ex-Tank Tales 173: I got such a toss from my mazoom in Philadelphia that [etc.].
1905		‘Hugh McHugh’ You Can Search Me 12: I’m shy with the mazume.
1912		Ade Knocking the Neighbors 127: Otis was supposed to possess the Faculty of copping the Mazume.
1924		F.J. Wilstach Sl. Dict. Stage 29: ‘Mazum,’ ‘mazuma,’ ‘cush,’ ‘denoya,’ ‘rocks,’ ‘spons,’ ‘spondulix,’ ‘long green,’ ‘yellowbacks,’ ‘dough,’ ‘mononny,’ ‘da mon’.