Green’s Dictionary of Slang

(US) a Domincan, also attrib.

2017		D. Winslow The Force [ebook] Pena breaks it down from kilos into dime bags and distributes it to the Domo gangs, the Trinitarios and DDP (Dominicans Don’t Play) .
2017		D. Winslow The Force [ebook] ‘The real question [...] is who is going to win between you and the Domos?’.
2020		L. Lungaro The 3-0 302: On their way, they made comments about all the Domos, short for Dominicans, out on the street corners.