How is “go to bat for” used?

In The Apartment (1960), one line is: “We went to bat for you. Now you won't play ball with us.”

Which movie is “go to bat for” from?

The clip at the top of this page is from The Apartment (1960).

We went to bat for you. Now you won't play ball with us.

4 作品で登場 · 1 本目

to give sb help and support

くだけた · アメリカ英語 · 3 本の映画に登場

定義：Oxford Advanced Learner's Dictionary 第 9 版