What I love about the French language is that they have words and expressions that the English language cannot express! Je ne sais quoi in one of those phrases.
What does "je ne sais quoi" mean? It means that little something; a quality that eludes description. Ex. "The Mona Lisa's smile has a certain je ne sais quoi". Je ne sais quoi is French for "I do not know what". I love that phrase, don't you? Praying your day has a little "je ne said quoi" in it!!!