Naomi Campbell Gene Shaw/Getty Images WWD/Getty ImagesWhat is the slip bob? It’s essentially an elongated airy bob, cut to encourage movement. As Dale explains, “The slip bob just kisses the shoulders, with some invisible layers. 43 Bob Haircut Ideas to Copy Immediately Gallery 43 Slides View SlideshowWhy choose the slip bob? “It’s all about clean lines, glossy shine, and fluid movement.