gypsy’s warning, n.¹ — Green’s Dictionary of Slang

gypsy’s warning n.¹

also gipsy’s warning

[rhy. sl.]

morning; also as ‘good morning’.

1898		Hartlepool Mail 26 Feb. 6/4: Gibsey's [sic] warning, rhyming slang for morning.
1960		J. Franklyn Dict. of Rhy. Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1992		R. Puxley Cockney Rabbit.