The triangular balloon of fat between the belly button and privates that obese women and men display, especially when wearing tight pants, camel toe inclusive. It's not hot.
You: What the hell happened in your math class!? I could hear the sound two doors down, thought there was a fight.
Me: That was the sound of my professor's coffee smashing on the floor. She turned to explain something too fast and knocked it over with her crotch pocket.
You: Oh... eww.