A personality disorder in which the individual
chronically lives "on the borderline" between normal, adaptive functioning and
real psychic disability. Usually such a person is identified by any of a number
of instabilities with no clear features; e.g., interpersonal relations tend to
be unstable, self-image may be disturbed, displays of anger and temper are
common, impulsive acts that are self-damaging, like gambling or shoplifting,are
frequent.