How is “have legs” used?

In A Star Is Born (2018), one line is: “If you don't dig deep in your fucking soul, you won't have legs.”

Which movie is “have legs” from?

The clip at the top of this page is from A Star Is Born (2018).

if you say that a news story, etc. has legs, you mean that people will continue to be interested in it for a long time

informal · Heard in 3 movies

if you say that a news story, etc. has legs, you mean that people will continue to be interested in it for a long time

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

If you don't dig deep in your fucking soul, you won't have legs.

Said in 8 films · #1