How is “and no mistake” used?

In Night and the City (1950), one line is: “Helen, you're a wonder and no mistake!”

Which movie is “and no mistake” from?

The clip at the top of this page is from Night and the City (1950).

Helen, you're a wonder and no mistake!

6 作品で登場 · 1 本目

used to show that you are sure about the truth of what you have just said

古風 · イギリス英語 · 5 本の映画に登場

オックスフォード映画の 100%
used to show that you are sure about the truth of what you have just said
Heavy weather brewing at number 17, and no mistake.
of a swine and no mistake He's

定義：Oxford Advanced Learner's Dictionary 第 9 版