How is “for a song” used?

In Venom (2018), one line is: “Tell you what, you give me a dollar for a song, I'll throw in the paper.”

Which movie is “for a song” from?

The clip at the top of this page is from Venom (2018).

Tell you what, you give me a dollar for a song, I'll throw in the paper.

5 作品で登場 · 1 本目

very cheaply; at a low price

くだけた · 4 本の映画に登場

オックスフォード映画の 100%
very cheaply; at a low price
Ten years ago He came and paid for Cosette I let her go for a song It's time we settled the debt This'll cost him dear!
Tell you what, you give me a dollar for a song, I'll throw in the paper.

定義：Oxford Advanced Learner's Dictionary 第 9 版