Green’s Dictionary of Slang

sausage and mash n.

[rhy. sl.]

1. cash.

[UK]J. Jones Rhy. Cockney Sl.
[UK]P. Wright Cockney Dialect and Sl. 104: sausage an’ mash ‘cash’.
[UK]R. Puxley Cockney Rabbit.
[Aus]Pete’s Aussie Sl. Home Page [Internet] sausage and mash: cash.

2. a smash, a car crash.

[UK]Dodson & Saczek Dict. of Cockney Rhy. Sl.
[UK]R. Puxley Cockney Rabbit.
[UK]B. Kirkpatrick Wicked Cockney Rhy. Sl.