My girlfriend has the habit of saying "uh-oh!" with no further explanation. Often this happens when we are in different rooms, so I can't immediately see what the problem is. So today I told her that from now on after saying "uh-oh" she should say a number between 1 and 10 to indicate the severity of the issue. For example, "uh-oh 1" would mean something like, "uh-oh, I can't decide which pair of shoes to wear." But "uh-oh 10" would mean something like, "uh-oh, the house is on fire, and also some zombies are trying to break down the front door to come in and eat our brains."
We'll see how this works. So far I have gotten an "uh-oh 3" which meant "I can't find my iPhone."