When you're saying cool and lol at the same time, it's easier to shorten it to coolol. Plus, it sounds a lot cooler.
Carlie: I just saw a Neopets commercial!
Eric: Coolol!
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Tootally is the cool way to say 'totally'. It originated from a typo, and now it has become a widely used word on Facebook by the best users.
Lisa: Twix are so cool!
Jasper: Tootaly!
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