The word 'kill' is usually associated with a negative meaning.
He was killed in a fatal car crash. In this sentence, kill means to cause someone's death.
But kill does not always have to be used in a negative way. The examples below explain this. It is to be noted that they are mostly used in informal terms.
You killed it! = You did an amazing job!
This is used as a compliment when you've done something really well, like a dance performance. This could also be used to compliment how someone looks.
You're killing it in that outfit = You look so good in that dress.
Another use of this word is when you want something badly(and immediately) especially while talking about food.
I could kill for some pasta right now.
Can you think of other contexts in which the word 'kill' is used?