just straight up tell that person, I do it all the time but saying "listen man, you're really annoying and I don't like you" barely works so I scream "f*** off you annoying douche!" and my problem goes away
Stay away from them and their hangouts if possible. Sometimes in life we just have to walk away from some people we don't want in our life anymore and if its a work situation, you can still give them space!!
Well, Baller, unless you just "want" to use the word "annoying", I guess you could say something like, "I'm busy now. Can I ignore you some other time?" That might get the point across. Now, I'll tell you my all-time favorite, but it my be a little harsh for your situation. Somebody has to really have made me angry for me to say this, "How many times do I have to flush to make you go away?" (I know that's terrible, but, like I said, I have to be really, really aggravated and you're probably not that aggravated.) LOL
give them gum or something to keep them from talking like offer them food or a snack thats a nicer way dont curse at them you could say the better things are left unsaid or you could say hey lets just enjoy are surroundings and soak it all in by being silent or tell the person you should go on. that show silent library