and just to add on to maki's helpful little guide, here's a few more:

I'm from America, and I'm here to make some friends: я педораст из Америке, ищу таких же друзей

If you want to tell someone off:

Go screw your mother, or better yet - yourself! :моя мама, абязяна, а оттец - обязянафиль
All you haters can suck my dick: паложите ваш хуй ко мне в заднецу