Totes = totally
Natch = naturally
Srlsy = seriously
Frills = for reals
Kthxbye = Kthxbye
Also, adding "sauce" or "spice" to the ends of words. You may think every returned missionary on the planet thought of that one first, but nope, 'twas me.
And another one - pwned. I don't really know what that one means yet, but DIBSIES!
* If you feel the urge to kick me in the teeth right now, don't worry, I'm right there with you.