nash, n. — Green’s Dictionary of Slang

nash n.

also nyash

[Carib.E. nash, soft, effeminate; ult. Eng. dial. nesh, juicy, succulent, tender]

(W.I. Rasta) the female genitalia.

2004		‘Patois Dict.’ at www.dancehallareaz.com.
2022		Central Cee ‘LA Leakers Freestyle’ 🎵 Strip club and they're shakin’ ass / But in my words, they're shakin’ nyash.