Been There, Done That Meaning

(idiomatic) (ironic) an assertion that the speaker has personal experience or knowledge of a particular place or topic

Example:   Paragliding? Been there, done that, bought the T-shirt.
2012 May 31, Tasha Robinson, “Film: Review: Snow White And The Huntsman”[1]:
  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.