How is “my foot” used?

In His Girl Friday (1940), one line is: “So sorry, Gus. My foot must have slipped.”

Which movie is “my foot” from?

The clip at the top of this page is from His Girl Friday (1940).

the speaker's own foot, the body part at the end of the leg; a strong way of saying that you disagree completely with what has just been said

informal · humorous · Heard in 32 movies

Editorial50% of films
the speaker's own foot, the body part at the end of the leg
Oxford20% of films
a strong way of saying that you disagree completely with what has just been said

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

So sorry, Gus. My foot must have slipped.

Said in 8 films · #1