腰こしだめ

noun

shooting from the hip

Literally firing a gun held at hip level without aiming through sights. Also used figuratively for acting without careful preparation.

• 西せい部ぶ劇げきでは、ガンマンが腰こしだめで撃うつシーンがよくある。

  In Westerns, there are often scenes where gunslingers shoot from the hip.

noun

acting on a rough estimate; starting without enough preparation

Idiomatic use: doing something based on a vague guess or without thorough planning, like shooting from the hip.

• 彼かれは腰こしだめで事じ業ぎょうを始はじめたが、うまくいかなかった。

  He started the business on a rough estimate, but it didn't go well.

• 腰こしだめの判はん断だんは危き険けんだ。

  Making a decision based on a vague guess is risky.