a "literally me character" is a character in which filmbros identify, some examples of literally me characters are:
Patrick Bateman from American Psycho, Ryan Gosling in Drive, Tyler Durden in Fight Club if a filmbro tells you that he really is like one of these characters RUN
Short-hand for the word floccinaucinihilipilification, meaning the estimation of something as valueless (encountered mainly as an example of one of the longest words in the English language).