http://en.wikipedia.org/wiki/Malingering
Malingering is a medical and psychological term that refers to
an individual fabricating or exaggerating the symptoms of
mental or physical disorders for a variety of
motives, including getting financial compensation (often tied to
fraud), avoiding work, obtaining
drugs, getting lighter criminal sentences, trying to get out of
going to school, or simply to attract attention or sympathy.
Because malingerers are usually seeking some sort of primary
or secondary gain, this disorder remains separate
from somatization disorders and
factitious disorders in which the
gain is not obvious. Legally, malingering is often referred to as
fabricated mental illness or feigned mental
illness.