How is “waste away” used?

In The Dawn Wall (2017), one line is: “You know, we're sort of just wasting away.”

Which movie is “waste away” from?

The clip at the top of this page is from The Dawn Wall (2017).

You know, we're sort of just wasting away.

3 作品で登場 · 1 本目

to become thin and weak, especially because of illness

7 本の映画に登場

オックスフォード映画の 100%
to become thin and weak, especially because of illness
So, why does the human continue to waste away?

定義：Oxford Advanced Learner's Dictionary 第 9 版