According to Wikipedia:

Kleptomania

is an irresistible urge to steal items of trivial value. ... Frequently thought of as being a part of obsessive-compulsive disorder, since the irresistible and uncontrollable actions are similar to the frequently excessive, unnecessary and unwanted rituals of OCD.

in other words, a person with the compulsion to steal. a shoplifter. a thief. disorder is usually present in teenage girls, who do it because they are either depressed, feel unworthy, stressed, or pissed off at the world. or simply, for the thrill of it.

wow.

:)