How do you describe CrossFit?

I was just talking about this with a CrossFit Eaton member today...when people ask "what is CrossFit?", how do you answer?  It's tough to just give a one sentence answer.  There's so much to it, you almost need 15 minutes just to touch the surface!  How do you answer that question?  

Gettin' after the front squats and burpies7/6/11

WOD

"8's"

8 rounds of

8 deadlifts (255/185)

8 box jumps (30/24)

8 KTE