How is “talk shop” used?

In Ralph Breaks the Internet (2018), one line is: “While we're talking shop, what move did you do to get through that tunnel of fire?”

Which movie is “talk shop” from?

The clip at the top of this page is from Ralph Breaks the Internet (2018).

While we're talking shop, what move did you do to get through that tunnel of fire?

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to talk about your work with the people you work with, especially when you are also with other people who are not connected with or interested in it

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to talk about your work with the people you work with, especially when you are also with other people who are not connected with or interested in it
-or their work would be unbearable. -Don't encourage me to talk shop.

定義：Oxford Advanced Learner's Dictionary 第 9 版