How is “bust up” used?

In The Last Picture Show (1971), one line is: “Hey, listen. You hear they busted up, let me know.”

Which movie is “bust up” from?

The clip at the top of this page is from The Last Picture Show (1971).

to have an argument and separate; to make sth end by disturbing or ruining it

informal · Heard in 8 movies

1
to have an argument and separate
They bust up after five years of marriage.
2
bust sth up
to make sth end by disturbing or ruining it
It was his drinking that bust up his marriage.

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

Hey, listen. You hear they busted up, let me know.

Said in 8 films · #1