|I was wondering about "billy-oh", a term my dad used to use. He would say "it's going to rain like billy-oh". Or maybe it was billy-ho; I was never quite sure, and I don't remember hearing the phrase elsewhere. I don't know where he picked it up, but it turns out to be of British idiom. What surprised me is that "billy-oh" is considered synonymous with the American "all get out". Go figure.