Green’s Dictionary of Slang

saint and sinner n.

dinner.

1938		J.B. Booth Sporting Times 89: I’d ’ardly got a touch-me in my sky, much less an amesjay to pay for me saint an’ sinner!
1960		J. Franklyn Dict. of Rhy. Sl.
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1999		R. Walton ‘Cockney Jack’ 🌐 At saint and sinner that take a fright [...] Jack and his cheese and kisses ate their stomach ache and give and take.
2002		B. Kirkpatrick Wicked Cockney Rhy. Sl.