Ok so I really can't think if any stand out words at the moment, so I'll opt for a casual slang word - "Bro".
I say this purely in a mocking manner but I hate the term when used. We don't tend to use it that much over here, but over the Internet it's just everywhere. However, if used in a friendly way, I'm not going to get all mad, it's mainly when it's used in the other way. People use it to soften a blow, for example; "I hate everything about you..... bro". Yeah don't call me bro when you're clearly insulting me, I am not your brother nor your friend so don't use it when your saying something negative towards me.
It's not that I hate the word, it's just the context it's used in that I particularly dislike.