Green’s Dictionary of Slang

cha-cha n.

1. (US black) sexual intercourse.

1996

Puff Daddy on Lil’ Kim ‘No Time’ 🎵 on Hard Core [album] Bet your man won’t do it like that / Can’t work the middle, plus his thing too little / Let me grab your ta-ta’s, do the cha-cha.

2. cocaine.

2011

J.J. Connolly Viva La Madness 96: He holds it up to her nose [,,,] so she can snort some cha-cha and get charvered at the same time.

SE in slang uses

In compounds

cha-cha queen (n.) [SE cha-cha, used as a generic for Spanish-American + queen n. (2)]

(US gay) a Hispanic male homosexual.

1988

H. Max Gay (S)language.