Cockney Rhyming Slang - Brown bread

One of the more common rhyming slang is brown bread meaning dead. I've no idea why brown bread became the established rhyming slang as opposed to white bread, granary bread or indeed any other type of bread.

Toasted bread is used but mostly abbreviated to just 'toast' and used in expressions such as "If you don't pay the money you owe, you'll be toast".

'Loaf of bread' is used to mean head and you will often hear the expression "use your loaf" to mean think before you act/use your head.