Kat —

"Something·rude-all" is an odd English idiom for 'nothing': 'fuck-all, 'bugger-all', 'sod-all', 'bleed-all' — all mean 'nothing', idiomatically. Why, I have no idea.

An odd idiom to emerge from this is the use of a C19 murder ballad, about the 1867 gruesome murder and cutting up of her corpse by one Frederick Baker, of a girl called Fanny Adams. This produced two spin-offs: soldiers'/sailors' slang for canned meat served in the men's mess became known as Fanny Adams. And 'Sweet Fanny Adams', first line of the chorus of the murder ballad, became a euphemism for 'Sweet fuck-all' - so that you will still hear people [esp in Cockney dialect, is my impression] say that something like, 'That has got Sweet Fanny Adams to do with it' — sometimes abbrv'd to 'Sweet FA', or even 'SFA' - both of which last usages , so it seems to me, defeat the euphemistic object.