How is “on heels” used?

In Michael Collins (1996), one line is: “You've been on my heels for weeks.”

Which movie is “on heels” from?

The clip at the top of this page is from Michael Collins (1996).

You've been on my heels for weeks.

2 作品で登場 · 1 本目

very close behind sb / sth; very soon after sth; following closely behind sb

3 本の映画に登場

1
(hard / hot) on sb's / sth's heels
very close behind sb / sth; very soon after sth
News of rising unemployment followed hard on the heels of falling export figures.
2
at / on sb's heels
following closely behind sb
He fled from the stadium with the police at his heels.

定義：Oxford Advanced Learner's Dictionary 第 9 版