I'm a subscriber to Private Eye, the British satirical magazine which appears once a fortnight. One of the Eye's best features is its covers. The latest one relates to Hillary Clinton's announcement last Sunday that she intends to run for president in 2016.
The picture shows Hillary and her husband Bill. Hillary says, "It's time to have a woman in the Oval Office". Bill replies, "Been there, done that".
The joke relies on the double meaning of the verb 'to have', which can also be used mean 'to have sex with'. The reference is to Bill Clinton's affair with White House intern Monica Lewinsky when he was president. "Been there, done that" is an ellipsis for "I have been there and have done that". The expression is used when the speaker wants to highlight his personal experience or knowledge of a particular place or topic (often in a show of one-upmanship). • Paragliding? Been there, done that, bought the T-shirt.