You see, I would argue that the facetious use of "literally" is not changing the definition of the word. When someone is saying "Ohh my God, my head literally e

You see, I would argue that the facetious use of "literally" is not changing the definition of the word. When someone is saying "Ohh my God, my head literally exploded!" the use of "literally" is not meant to be taken literally. It's intended to add on an additional layer of exaggeration atop a ludicrous situation. The reason people say it is to make a joke. People aren't literally going out and using literally to mean figuratively. If literally meant figuratively, it wouldn't be used to express exaggeration in a joking manner.