Top Definition
A person who spends most of their time watching porn and is intimately familiar with most porn stars and their mating behaviour.
Joe: Hey how come Trevor never gets out much?
Frank: He's a pornothologist...lots of studying to do.
by rediroma May 19, 2009

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×