This is West African word to mean a sexy, well-shaped big and flawless ass or backside of a woman which is mostly considered attractive and lovely when choosing a desired woman.
Bring that nyash close, I want to feel it if it's real or not
Nyash, also known as ass is used to describe different categories of ladies depending on their origin. Ladies from Banda, Gulu, and Karamoja have no nyash. They are time wasters. Martin
The word nyash is used to describe big ass, or booty.