浮うわ気き者もの

noun

cheater; unfaithful person; adulterer

Refers to a person who is unfaithful in a romantic relationship; can be used for either gender, though often for men. Slightly colloquial.

• 彼かれは浮うわ気き者ものだから、彼かの女じょに振ふられた。

  He's a cheater, so his girlfriend dumped him.

• 浮うわ気き者ものは信しん用ようできない。

  You can't trust a cheater.