If a girl is described as 'no better than she should be' one is suggesting, by this classic understatement, that she is immoral. The first record of it is from an early 18th century translation of Cervantes ‘Don Quixote’. Whether it was coined at the time or was an earlier phrase that was in common usgae no one knows.
Perhaps not surprisingly there is no equivalent male phrase that I am aware of.
Katie aged 6 months
20 hours ago