Green’s Dictionary of Slang

(US) money.

1957		(con. 1943) A. Myrer Big War 21: Kind of low on the mazoo?
1960, 1975		Wentworth & Flexner DAS.
1961		R. Gover One Hundred Dollar Misunderstanding 23: All that mazoola, he kin be jes’s dum’s dum kin be!
1982		J. Sullivan ‘The Yellow Peril’ Only Fools and Horses [TV script] Give us the money then, give us the mazoola.