How is “be my guest” used?

In The Dark Knight (2008), one line is: “You wanna ride across with them? Be my guest.”

Which movie is “be my guest” from?

The clip at the top of this page is from The Dark Knight (2008).

You wanna ride across with them? Be my guest.

8 作品で登場 · 1 本目

used to give sb permission to do sth that they have asked to do

くだけた · 54 本の映画に登場日常フレーズを再生

定義：Oxford Advanced Learner's Dictionary 第 9 版