How is “save bacon” used?

In The Mummy (1999), one line is: “You see that girl? She saved my neck.”

Which movie is “save bacon” from?

The clip at the top of this page is from The Mummy (1999).

to rescue sb from a very difficult situation

informal · Heard in 4 movies

Oxford100% of films
to rescue sb from a very difficult situation
We're here to save your bacon.
I don't want you to tell me anything but what is needed to save your neck.

Definitions from the Oxford Advanced Learner's Dictionary, 9th edition

You see that girl? She saved my neck.

Said in 3 films · #1