been there, done that, bought the T-shirt

📖 general
Meaning
An emphatic version of 'been there, done that,' suggesting not only extensive experience but also that the experience was so significant (or cliched) that one has the souvenir to prove it, often implying a dismissive or jaded attitude.
Literal Meaning
To have visited a place, performed an action, and purchased a commemorative garment.
Example
“Another workshop on teamwork? Honestly, been there, done that, bought the T-shirt. I don't think it'll help.”