dog's...
I'd heard (I forget where... QI, possibly?) that "dog's bollocks" came from some product or another which came in two styles: Box Deluxe, and Box Standard. The deluxe version was spoonerised into Dox Beluxe, and hence into "dog's bollocks", and the standard became known as "bog standard"...
Now, if I could only back these assertions up with some form of evidence... Ah well, it serves as a useful anecdote on the mutability of language in any case...


