How is “finish up” used?

In Unbreakable (2000), one line is: “Why don't you go upstairs now and let me finish up, okay?”

Which movie is “finish up” from?

The clip at the top of this page is from Unbreakable (2000).

Why don't you go upstairs now and let me finish up, okay?

8 作品で登場 · 1 本目

to complete the remaining part of a task, meal, shift, or piece of work

イギリス英語 · 38 本の映画に登場

編集映画の 100%
to complete the remaining part of a task, meal, shift, or piece of work

定義：Oxford Advanced Learner's Dictionary 第 9 版