A woman who is the embodiment of all things nasty. The word is comprised of numerous other words (a super combination, if you will). Slorntch means a slut/whore/cunt/bitch combo.
"I can't believe my brother is dating her...she's such a SLORNTCH!" Or, "There are a lot of slorntches up in heretonight!"
When a girl is straddling you and aggressively fingering herself to the point of extreme wetness, then sticks her fingers in your mouth... so far down your throat you gag.