Green’s Dictionary of Slang

feather (and flip) n.

a sleep or a bed.

1934		P. Allingham Cheapjack 188: ‘What about slippin’ up the apple and pears and gettin’ in feather? I’m just about charvered.’ [...] Feather was short for ‘feather and flip’.
1935		Thieves Slang ms list from District Police Training Centre, Ryton-on-Dunsmore, Warwicks 4: Feather and flip: Bed.
1960		J. Franklyn Dict. of Rhy. Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
2001		M. Coles Bible in Cockney 62: There’s no time for a feather whilst reading it.
2012		(con. 1980s) I. Welsh Skagboys 253: Ah feel like gaun straight back tae the feather n flip.
2018		I. Welsh Dead Man’s Trousers [18]: Nae hooring tonight, bud, plenty feather and flip, a big day the morn.