It's Not All Beer And Skittles
Not everything goes as well as it should.
Person 1: "Oh man! I just failed my midterms..."
Person 2: "Well, it's not all beer and skittles"
Person 2: "Well, it's not all beer and skittles"
not all beer and skittles
not entirely pleasant(skittles refers to a bowling type game played in taverns during the 1800s)
Most immigrants learn that life is not all beer and skittles when they arrive in the US.