Fortunately, in today's day and age, I can always just Wikipedia anything I don't understand. Quoth the article:
In modern terms the Deus ex machina has also come to describe a person or thing that suddenly arrives and solves a seemingly insoluble difficulty. While in storytelling this might seem unfulfilling, in real life this type of figure might be welcome and heroic.
You don't say.
So if a couple of years ago I said, "Man, I wish I knew what 'Deus ex machina' meant, but am nowhere near anyone literate," and then Wikipedia became popular, I guess that would have been a Deus ex machina. And now my world is a little richer.
Current Music: XTC - Go 2
Current seemingly insoluble difficulty: Gosh, I sure am hungry right now.
Current really seemingly insoluble difficulty: World hunger