porn pretty 

A descriptive of a woman who is not really all that attractive, but good enough to get the the job done.

Points to a significant number of porn actresses who are just average-looking when on the street, but...Hey! Who cares! They're naked and ready to go!

Jealous Jessica: What's with that skank with the booty shorts?!? She's not that pretty!

Dirk the Jerk: Of course she is! She's porn pretty!

porn pretty by The Man With A Third Leg September 12, 2017

Too pretty for porn 

The idea that there is a subset of women who are actually too good looking to ever appear in pornography. It arises because even if these particular women did want to make a living off their looks/body they would have many more and better options than porn, for example acting or modelling.

Jessica Alba is too pretty for porn.

Too pretty for porn by Hemat O'Cyte March 8, 2013

Pretty Enough for Porn 

A girl who is not really pretty, but is serviceable and has a knock out body (particularly if she has big tits) making her suitable Porn Star material.

Jessica Simpson has big teeth, but she is Pretty Enough for Porn.

Pretty Enough for Porn by boiler_92 June 21, 2006

Pornopretty 

A mediocre looking woman who's attractiveness increases only when she's naked

That girl there is pornopretty

Pornopretty by Slipknot#28 May 11, 2015