Assuming you're talking to your friend or someone with whom you don't need to be polite, here's a list of expressions you can use
"너 진짜 짜증나!" You're so annoying!
"그만좀 해! 짜증나!" Stop! That's enough! So annoying!!
"당신 정말 짜증나는거 알고 있어?" - Do you realize that how annoying you are? - Trying to be as polite as you can!
Again.. not polite ;)
Hope you don't have to use it very often! Good day!