Definition of been there, done that in English English dictionary
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.
(deyim) Meaning: An assertion that the speaker has already experienced the topic under discussion. Carries that implication that the topic isn't worth further investigation. Origin: Originally, in the late 1980s, a hip use of language: now becoming less so. Later 'got the t-shirt' was sometimes added for extra emphasis