nantois(e), n. — Green’s Dictionary of Slang

nantois(e) n.

also nantwar

(Polari) general negative, no, nothing, none.

2019		P. Baker Fabulosa! 295/2: nantoise, nantoisale 1. no, none. 2. inadequate.
2023		R. Milward Man-Eating Typewriter 45: [T]urning our eeks to just throbbering hexagons [...] then natwar.
2023		R. Milward Man-Eating Typewriter 129: ‘Anything new at all?’ [...] ‘Nantoise, I’m afraid’.