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Any female who has let herself go, and by result has reached or surpassed 150 pounds. Usually reserved for a girl who once possessed a decent figure, but now has a beer belly and a double chin.

Some girls can become known as "Deuces"(reach the 200lb barrier), but these girls were most likely very fat before their additional enlargement, so no one really cares enough to acknowledge them.
Damn have you seen Brittney? Looks like the 150 club has a new member.
by Steve - Houston July 11, 2006