Homo sapien of the lowest kind. A sleezy man who will use cheesy pick-up lines and refer to you as a "sexy creature." One of distasteful ancestry. Always watch out for a shit butt within a close proximity, because they will de-flower you of your human likeness, and thus more shit butts will multiply.
A person or thing that is extremely shitty or known to be basic. Doesn't necessarily mean that individual is a terrible person; just that they are now marked as a shit butt (ass).
When a cat steps out of the litter box with poop still attached to their fur.
Cady is a shit butt because that's just who she is!
(shit ton * fuck ton) + (butt load * fuck load) = shit ass butt load Its the most you can have of something. You cant have more than a shit ass butt load of something... IT DOESNT HAPPEN!!