Shivu
You know in the elephant graveyard when Simba says to Zazu, "But Zazu, you told me they're nothing but solbering, mangy, stupid, vultures." And then Zazu says, "Exne' on the oopenste'" Inwhich Banzai replies, "Who you callin' Oopenste?!" Well obviously it's an anagram but what of? (Uh... idioticness... how I hate you so...)
Ixnay on the oopid-stay.
Which if we refer to urban dictionary means:
It's a saying basically for someone to stop saying that someone is "stupid" because they are probably right behind him/her.
Elsewhere I also found this better explanation:
Ix-nay in pig latin is "Nix" which means 'no' or 'stop talking about'
Oopid-stay is pig latin for Stupid (or Stoopid depending on the way ur spelling it)
So I guess it would mean, stop talking about THE stupid [person] or stop talking stupid
Also another source confirming it and putting it very simple:
This is Pig Latin, where you take the first letter or letter combo of the word and put it at the end with "ay". So "ix-nay" is "Nix" - which means, "Stop!", and "oopid-stay" is "stupid."
I found no other anagram references. But also on related note, for anagram problems, here is one site that does the hard work for you:
http://wordsmith.org/anagram/
It will automatically search anagrams for you. You just need to go through list and search for one you were really looking for.