We've heard the phrase Uh-oh, as in, uh-oh, I slept through my final exam! And we've even heard Ruh-Roh, as popularized by Scooby Doo. When K and N and I were traveling around Iceland, we decided that a more formal way to 'uh-oh' is to overemphasize the end of the first syllable by adding a previously unheard 'T'. It's very distinguished now. Proper for even British royalty, or perhaps BBC detective series. Here is an example of its new use.