A person who is so fat that there form, usually included both "back-tits" and "front-butt", has become egg-like, with the exception of their legs, which are always dwarved by their egg-shaped bodies.
Person 1: "She's incredibly fat!"
Person 2: "I know...look at that egg on legs."
The resulting brown soft-serve trail of excrement when people with leaky assholes can't make it to the bathroom in time.
Old ladies that don't make it into the bi-lo bathroom in time leave a dookey trail so that you know where to start and stop cleaning.