I *think* I know the answer to this, but it's not in my dictionaries of idioms nor on a lot of the web pages I tried. I know that a slam dunk is a spectacular basketball shot where the player jumps and drops/throws the ball down the hoop. However, from programmes (sorry 'programs') like Friends I also get the impression it means something else. My reading is that it means 'unambiguous'. However, am I wide of the mark?