顰ひそみに倣ならう

expression, godan verb (-u)

to imitate foolishly; to blindly follow a bad example

Idiomatic expression meaning to copy someone else's bad habit or mistake without thinking. Often used self-deprecatingly or to criticize mindless imitation. The usage note 'sometimes humble' reflects its use in humble contexts when referring to one's own actions.

• 彼かれがやっているからといって、顰ひそみに倣ならって同おなじ失しっ敗ぱいをする必ひつ要ようはない。

  Just because he's doing it, you don't need to imitate him foolishly and make the same mistake.

• 私わたしも顰ひそみに倣ならって、つい無む駄だ遣づかいをしてしまった。

  I also blindly followed suit and ended up wasting money.