How do you say ...

"You are evil."

... in Russian.

I don't know how to get across the intent of the expression. In english it is just an expression used between friends. It does not mean one person is actually evil or malevolent. It is sort of an idiom. When someone says to their friend, "You're evil," it basically means that the friend got the best of them or got on their nerves.

Thanks you so much for your help.