They're between 18 and 34, and while they may look normal, they're anything but. We all know them. They're opinionated. They're well-educated. They're tech-savvy, and they also happen to be the largest generation since the baby boomers. They are, of course, millennials, and with their vast numbers comes great influence.
Their preferences have shaped the lexicon in ways big and small. They're vocal about what they like and even more so about what they don't. Listed here are a few of the many things they're "allergic" to, and how those allergies have helped redefine the language we use (or how they've made some of it obsolete entirely).
Also, a word to the wise, don't tell them they're being categorized. They're allergic to labels, too.