妹妹头是发型的一种，常见的特征是后面不到衬衫领、头发贴近耳下、前面浏海不到眉毛且不到嘴角的样子。

A bob cut or bob is a short haircut for women (and occasionally men) in which the hair is typically cut straight around the head at about jaw-level, often with a fringe (or "bangs") at the front.