How is “live and breathe” used?

In There's Something About Mary (1998), one line is: “As I live and breathe. Will you excuse us for a second?”

Which movie is “live and breathe” from?

The clip at the top of this page is from There's Something About Mary (1998).

As I live and breathe. Will you excuse us for a second?

8 作品で登場 · 1 本目

An exclamation of surprise at unexpectedly seeing someone, often after a long time.; to be very enthusiastic about sth

11 本の映画に登場

編集映画の 80%
An exclamation of surprise at unexpectedly seeing someone, often after a long time.
As I live and breathe. Will you excuse us for a second?
オックスフォード映画の 20%
to be very enthusiastic about sth
- Do you live and breathe Facebook? - Yes.

定義：Oxford Advanced Learner's Dictionary 第 9 版