Green’s Dictionary of Slang

gusto n.2

(US black) money.

[US]Toop Rap Attack 158: Gusto: money, cold cash, dinero....‘Hey man, it’s Monday. Where’s my gusto?’ [HDAS].
[US]Public Enemy ‘Black Steel in the House of Chaos’ [lyrics] I got gusto, but only some I can trust, yo.
[US]L. Stavsky et al. A2Z.