Green’s Dictionary of Slang

laugh and joke n.

a smoke.

1880		D.W. Barrett Life and Work among Navvies 43: Nobby, I’m going to do a ‘laugh and joke’.
1935		Thieves Slang ms list from District Police Training Centre, Ryton-on-Dunsmore, Warwicks 6: Laugh and joke: Smoke.
1939		V. Davis Gentlemen of the Broad Arrows 95: Someone’s having a laugh and joke (slang for smoke).
1954		J. Phelan Tramp at Anchor 159: The discussion as to [...] whether one had a tiddley or a laugh (i.e., a drink or a smoke).
1969		S.T. Kendall Up the Frog.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1980		Barltrop & Wolveridge Muvver Tongue 11: Referring to my father again, he would say [...] ‘I could do with a laugh and a joke’.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.