been there, done that
Definition from Wiktionary, the free dictionary
Ellipsis for "I have been there and have done that".
- (idiomatic) (ironic) an assertion that the speaker has personal experience or knowledge of a particular place or topic
- Paragliding? Been there, done that, bought the T-shirt.
2012 May 31, Tasha Robinson, “Film: Review: Snow White And The Huntsman”:
- Huntsman feints at being the Snow White retelling no one has ever seen before, but ultimately becomes the “been there, done that” of fairy-tale filmmaking.
assertion that the speaker has personal experience or knowledge of a particular place or topic