Who uses it: Law enforcement officials
What it means: The unknown subject of an investigation.
How you can use it: When you don't know who's responsible for something.
If you watched last night's episode of "The Sopranos," you know exactly who's responsible for shooting... oh, wait. Did anyone out there not see it? I don't care about spoiling it for any American readers, but I'm not sure when this season will air in Germany or the UK... so maybe I won't say any more about it.
But I watched Don Imus this morning, and if I didn't already have plenty of reasons to loathe and despise Donald Trump, his admission that he doesn't really care about "The Sopranos" would have been the last nail in his coffin.
I will say this, though. David Chase and his writers are never willing to let us get too comfortable with these characters. Just when we've decided Tony is a jerk, they show us him cooking dinner for the uncle who tried to kill him. Just when we think we'll root for Carmela, we see that she is a nasty piece of work in her own right. And everything -- everything -- has consequences. It's the best thing on television, and I may have to watch this episode again before next week.