What's a Popliteal?

So I told Chris that I started my own blog called "Popliteal" and he said, "Cop a feel?"  No, Popliteal.  It's the name for the back of your knee.  It came up because I was talking with my boss about something and we got off subject as we sometimes do and he said, "It's like how there's no name for the back of your knee."  Hmm.  I didn't know if there was or wasn't a name for that, but I asked the Doc and he said, it's your "popliteal."