A person that is on the edge of sanity, usually from
sleep deprivation, drug abuse, lack of exercise, or a general sense of
social anxiety. This is normally a person you are always cautious about when bringing around
industrious, socially pleasant, "normal" people.
Symptoms of being fringe include: (a) bringing up vague and confusing topics of conversation at any given time, such as
the Tao Te
Ching or
John Lennon; (b) rapid mood swings, more commonly aggression or despair; (c) telling pointless jokes and laughing for an extensive period of time, and then crying afterward.