Note that I also refer to the "average" or "typical" developer as being a member of "The Bubble Sort Crowd". If you're good you know what I mean. Otherwise, you're probably a member.
I know enough to know you mean there is a sub-optimal way to implement a sort, and it's the one that most beginning (or just plain bad) programmers will use. And while I don't know the best way to implement a sort, I know that I don't know it. So I know to look it up if I need to program a sort.
This is one of the large class of problems that I probably know something about, but don't know it by the same name as people who have had some schooling or formal training. Like in another thread when Ben was extolling the virtues of hashes: I asked if PHP supported them and Thane told me the syntax for it. I said, "Oh, that, I do that all the time."