They only have a hyphenated version, although my experience of the OED is that it likes hyphens. All the other dictionaries have
bone idle. My #10 was only really for reference, not a comment on hyphens.
Also, my tags in #9 seem to have disappeared -- can anyone else see them? It should read
bone idle (ugs.) Brit. -- stinkfaul
And finally, lazy bones (or lazy bum) isn't in LEO! (See OED in #10.) Who wants to suggest a German equivalent for me?
edit: the tags are back. I seem not to be able to see them when I'm replying, but they're back once I've hit send.