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1.
Any chick who you would never fuck, but wouldn't mind seeing in a porno movie.
She's all scrawny and leathery; there's no way I'd fuck her, but if I saw her in a porno I'd jerk off so hard. I guess you could say she's porn hot.
by Alex Stockwell July 27, 2009
 
2.
A woman who has had several cosmetic surgeries (eg. nose job, lip injections, extremely large breasts) making her look ridiculous by normal standards but attractive by porn standards. Often resulting in celebrity status in the porn community.
Guy 1: "Did you see that stripper's tits and lip injections?"
Guy 2: "Yeah she looked ridiculous but she's definitely Porn Hot."

Jenna Jameson
(after her recent plastic surgery)
by raoul_duke12 March 16, 2010
 
3.
A term used to describe a person who is so physically attractive that the mere sight of them in any mundane, typical setting and/or attire can be considered pornography.
Wow, that bartender is so fine she's porn hot.
by ChimpM8 January 10, 2014