"..like, literally."

I think that the word "literal" is used in a sentence when one means that he or she is being serious. Example: "It was "literally" the worst day ever." This implies that it was not just the worst day ever, but it was REALLY the worst day ever. I'm actually not completely sure. I try not to say things such as "like" or "literally" too much in my sentences. I find that it get irritating.