The act of being hideous toward others either for reason of humor or to prove a point. Hideousity is never shady, just fierce. Term coined by the DC Social Group, the House of Hideousity.
2. To be truly hideous (and thus acting with sheer and utter hideousity) one must be in some way intoxicated.
3. A reference to the genitals.
He enacted the best hideousity recorded for some time -- posting pictures of his best friend completely passed out and with marker written all over his face and arms.
Somebody who is extremely drunk and unable to care for themselves is being hideous: "Check out his hideousity."
Also, "I don't want to be anywhere near her hideousity because she has herpes."