What does the phrase Cosi Fan Tutte basically mean?

The phrase "Così Fan Tutte" is an Italian term that translates to "All Women Do It" or "Thus Do They All." It comes from the title of an opera by Wolfgang Amadeus Mozart, first performed in 1790. The phrase is often used to express a cynical view of women, implying that they are all inherently deceitful or unfaithful.