leetfreak
Someone who uses leetspeak so much they forget how to spell words like "the" and "and", and forget to use their real name, writing their online name instead
sarah_briarmoss: Hey how do you spell "the"?
Other person: You are such a leetfreak!
sarah_briarmoss: *writes* sarah... underscore... briar... moss..... hey wait *scribbles out* *writes Real Name instead*
Other person: You are such a leetfreak!
sarah_briarmoss: *writes* sarah... underscore... briar... moss..... hey wait *scribbles out* *writes Real Name instead*