偽にせ者もの

noun

fake; impostor; counterfeit

Refers to a person or thing that is not genuine; often used for people pretending to be someone else, but also for counterfeit goods.

• あの人ひとは偽にせ者ものだ。

  That person is an impostor.

• このブランド品ひんは偽にせ者ものかもしれない。

  This branded item might be a fake.