What does the phrase je ne sais quoi?

In French, it literally means "I know not what". The French idiom can best be translated as "a certain something." It's used to indicate qualities that are intangible, and hard to put into Words.

Example: "He did well with the ladies, as he had a certain je ne sais quoi."

The French pronunciation is (zhuh nuh say kwah) - ZH sound (JH) is the G in genre.

The US pronunciation sounds like (jen nay say quah).