Killing someone or something, usually in a very effective or impressive way.
Slaying can be serious or exciting, depending on the situation. It can also mean doing something really well.
Examples:
The knight is slaying the dragon.
She is slaying the competition.
He is slaying the giant with his sword.
I am slaying this game!
The superhero is slaying the villains left and right.
The chef is slaying the cooking competition.