play fast and loose

idiomatic

(idiomatic) To ignore proper behavior or social conventions, especially when it suits one's purpose.

Japanese Meaning

自己の目的を達成するため、通常求められる礼儀や社会的規範を敢えて無視すること / 自分の都合が合えば、正しい行動規範やマナーを省みず、ふざけた振る舞いをすること

Several investors decided to play fast and loose with the company's reports, and now regulators are investigating.

数人の投資家が会社の報告書を無責任に扱ったため、現在規制当局が調査している。

Sense（1）

(idiomatic) To ignore proper behavior or social conventions, especially when it suits one's purpose.

Sense（2）

(idiomatic) To be recklessly inaccurate, inappropriate, or otherwise ignoring guidelines and conventions.

Sense（3）

(idiomatic) To act in a tricky, inconstant way, saying one thing and doing another.

plays fast and loose

（ present singular third-person ）

playing fast and loose

（ participle present ）

played fast and loose

（ participle past ）

played fast and loose

（ past ）