Green’s Dictionary of Slang

neergs n.

[backsl.]

greens, green vegetables.

[UK]Hotten Dict. of Modern Sl. etc.
[UK]Hotten Sl. Dict.
[UK]Sl. Dict.
[Aus]Sydney Sl. Dict. (2 edn) 11: Neergs - Greens.
[UK]Northampton Mercury 12 Apr. 12/4: ‘Neergs,’ greens [...] ‘selopas,’ apples, ‘edgenaro,’ oranges and ‘doogheno,’ good, will serve to show [...] the secret language of the London costermongers.