To get solid metallic hydrogen, you'd need both high pressure and low temperatures; in the celestial bodies that can provide the former, the latter seems unlikely.
Your attempt at humour has been rightly sanctioned, but you weren't all that far from the mark. Jove is another name for the roman god Jupiter, and as such a Jovian planet is one that resembles Jupiter - ie. large gas giants, where metallic hydrogen is certainly thought to exist in nature.
