Two lovers who team up to commit crime, usually violent crime and especially robbery, and are usually on the run from the law. Such couples are almost always inspired by Bonnie Parker and Clyde Barrow, "Bonnie & Clyde." Which one is the brains of the outfit tends to vary from couple to couple. Sometimes one is a calm and collected criminal who charms the other into a life of crime. Other times, one is a loose cannon while the other is a cool-headed professional. Many Bonnie and Clyde stories end in tragedy, as did the original couple.