Looking to boost all online achievements. Send me a message over XBL. GT: GonzoPoopsmith
Your is possessive. In other words, you own something.
Ex: Your new baby alien loves to cuddle, but he keeps crapping in your refrigerator at night.
This is referring to your alien and your refrigerator.
You're is a contraction of "you are."
Ex: You're definitely cleaning out the fridge in the morning, assuming that little bastard can't keep his bowels in check.
This translates to "You are definitely cleaning..."