When you are so bored, you are thinking of killing yourself.
History teacher = "Today's lesson is about...."
Student = "Dude, this is making me boreicidal."
The backwords smiley face alone in a text is most commonly used when there is nothing else to say, or lack of interest.
John = dead pool is what?
Jill = a badass xD
Jonh = oh i just like his health bar hyper combo
Jill = (: