Green’s Dictionary of Slang

1. a delicatessen.

1917

R. Fry letter 11 May in Letters (1972) II 411: Come with me to Kettners’ nosh at 8.0 [OED].

2. food, esp. a snack.

1941		A. Kober My Dear Bella 49: ‘I’m oney taking a nosh, that’s all,’ said Jennie, hungrily eyeing the platter of salami. ‘Yeah, I know awready your noshing.’.
1960		(con. 1920s) R. Barber Night They Raided Minsky’s (1968) 169: They brought [...] plenty of nosherei. The standard nosh, or snack, consisted of pickle, [and] a bagel.
1962		R. Cook Crust on its Uppers 55: Indian nosh at a little gaff in Earl’s Court.
1975		Sun. Times Mag. 12 Oct. 32: So we goes along, and has a nosh, watching this garbage.
1984		‘Derek Raymond’ He Died with His Eyes Open 75: C’n I go on with my nosh? ’m on shift at two.
1990		S. Morgan Homeboy 295: Tell that dingbat maitre d’ to shlep over the sweet nosh wagon.
1999		Dandy 18 Sept. n.p.: Get rid of your mum’s nasty nosh.
2002		M. Coles More Bible in Cockney 137: They’d all had a good nosh.
2005		Mad mag. Apr. 31: Would you folks like a nosh?
2010		K. Richards Life 524: I cook [...] bangers and mash [...] or some other basic of English nosh.
2023		(con. 1962) J. Ellroy Enchanters 27: There’s a full bar and a deli-nosh spread.

3. in attrib. use of sense 1.

2015

J. Stahl OG Dad 92: [I'm] surveying the varying nosh techniques of everyone from Macy Gray (dainty) [...] to Tim Roth (laid back).

4. an act of fellatio.

1998		K. Sampson Awaydays 78: Sonia gets down and starts to suck me. A nosh from the Nosh Queen.
2001		K. Sampson Outlaws (ms.) 74: Watch a film with them, get over The Montrose, just get a nosh or something and still be back before midnight.
2005		B. Hare Urban Grimshaw 31: Last week they had a National Blowjob Day and everyone on the patch got a nosh.