When one looks terrible, or acts in such a way that makes them unpleasant to be around.
It is believed that this term originated as an opposite to the term
hotness, as they are so close to one another in appearance.
Guy 1: "That new redhead in Data Admin...I have but one word:
hotness."
Guy 2: "Yo, are your eyes broke, or what? She looked a
hot mess when I saw her."