How is “be off for” used?

In As Good as It Gets (1997), one line is: “something will always be off for you unless you set it straight.”

Which movie is “be off for” from?

The clip at the top of this page is from As Good as It Gets (1997).

Idiom

to have a particular amount of sth

informal · Heard in 1,096 movies

be off for sth
to have a particular amount of sth
How are we off for coffee (= how much do we have)?

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

something will always be off for you unless you set it straight.

Said in 8 films · #1