I tend to use "whatevs", "sure", "m'kays", "freaking", "thankies" or "meh" a lot in real life, and my most commonly used greeting has to be "yo". I also like to use the phrases "epic fail", "you fail", and "you suck". No I am not a mean person; I just tend to use those phrases a lot when I'm joking around, which is... most of the time. You can also find me using you or I as 3rd person pronouns, like, "I wants one" or something.
Non-english stuff-wise, I do/did say a lot of random Japanese stuff towards the end of the school year, including stuff like sorry, thanks, I see, I'm glad, yes, no, and "watashi wa baka" or "kimi wa baka", among other things. And yes I am aware that my Japanese speaking skeelz fail, but meh.
I have a list of other phrases I used a lot somewhere... dunno where exactly, though. But basically, if you saw me use the phrase/word a lot in chat, chances are I use it just as frequently, if not more, in real life.