A move that only a king would make. An action that shows courage and single-mindedness. The activity of a man who knows what he wants, and takes it.
Lew: I'm having McDonalds this evening and I don't care what my girlfriend says.
Alex: King move.
A saying meaning you value your own well being and safety above taking foolish risks with little to gain
Why don't you go over to Palestine then?
I'm good bro. Kings don't move into check