"You're staring."

Put that in your back pocket and pull it out whenever necessary. Make up a repetoire of short, sharp and concise rebuffments. Know them well and use them like Karate.

"Do not continue to communicate with me."

Things like that are clear to even drunk people and a command like this one is unemotional and doesn't necessarily invite further comment.

Experiment with some of your own! Thrill and amaze friends. FUN AT PARTIES!