What does kings x mean?

Answer 1

To give the "king's x" means to surrender in a fight.

It's probably too much a relic of the time when kids played outdoors for some people to know it. In games of tag or chasing, if you say "King's X" and hold up your hand with the first two fingers crossed it's a kind of "white flag." It means you're safe for a moment to tell someone something, or to discuss something. It's a truce, not a surrender. When you uncross your fingers, the game goes on. Predictably the phrase is old enough to have been taken as a name by a rock group, in this case a Christian rock group trading off the idea of Jesus as The King and the X as a cross.