Green’s Dictionary of Slang

tea-and-toast n.

[rhy. sl.]

the post, the mail.

1935		A.J. Pollock Und. Speaks.
1944		Maurer & Baker ‘“Aus.” Rhyming Argot’ in AS XIX:3.
1960		J. Franklyn Dict. of Rhy. Sl.
1992		R. Puxley Cockney Rabbit.