A narcissistic pathological liar with sociopathic tendencies. Has a tendency to tell stories that are completely untrue to perpetuate lies about people he claims are his friends and lies about his own life to ellicit emotions, like sympathy and envy, from his friends. He is intelligent enough that it takes a while to catch on to his lies. Often, there is no point to his lies - he tells them just to tell them.
That guy is such a Chad. I can't believe we didn't question his lies!