I have been there, I have done that.
Normally, this relates to a conversation about a piece of common experience – implied in words “there” and “that”, in a tone of suggesting consent to the other party in the dialogue. The the “complete” sentence may look like this:
Yeah, I hear you – I have been there, I have done that.
But for short, it comes out as:
Been there, done that.
闲着没事,乐一乐,俺没有那么学究。多哥的好心看得见,大局不亏,小处的那种穷讲究不要也可。