Who came up with the phrase sleeps like a baby? I would love to meet that person. Better yet, I'd love to meet their baby. If I was using a phrase to describe how my baby sleeps, it might be more along the lines of sleeps like a hyena or maybe a circus. There is more grunting and whimpering than I would have ever imagined, and this does not line up with the angelic image I had in my mind of a silent peaceful sleeping baby.