a hanger
A hanger is when your boobs are so saggy and big they look like they're trying to start a new religion, and your nipples are pointing south like a compass.
"My boobs are sagging so bad, I think they're going to start a new religion.", Mia, in the middle of a math test
"My nipples are pointing south. I think the earth is going to move.", Emma, during lunch
"My boobs are saggy and big, and I'm not even wearing a bra.", Rachel, in the middle of a dance class