In the early 90s, when I was a new alumnus still in Tallahassee, one of the actives put on like 30 pounds over the summer. Everyone started saying, "Chad, you're fat." We would just smile and say, "
you're fat," like it was a greeting. And soon, it was. All of that semester, the whole chapter would say "you're fat" to each other, like we were saying "aloha" or "shalom."
Guys will celebrate their beer bellys, and laugh about being fat. Telling a girl that she's fat will bring her to tears.