There's not much better than killing off a Raze before she can finish yelling "Fire in the ho-" or an enemy Viper that you get to kill the moment she releases her ult. Anyone else love the feeling?

What does "slay" exactly mean in this context? English is my second language and i'm not really sure about the meaning. I know that the verb "to slay" means "to kill" but it's used as a noun. Is it a meme? Sorry if the question is dumb. Ed...