potterologist 

Someone whom studies Harry Potter like it is a profession.

My friend knows every line in Harry Potter. What a potterologist.

potterologist by SA11 October 21, 2009

Otterologist

One who studies the art of otters

Jim is an Otterologist

Otterologist by DowneyNation June 14, 2016

Peterologist 

A slut who gives sex reports on dates she goes on, and tells all her friends how big her dates penis was.

Susy: How was your date last night?
Mary: Bad! It was a short one and he almost got stood-up.

Sex Peterologist Peterologist says Shorty Pterologist says Bigunn Peterologist got a Deep Peterologists Throat

Peterologist by Webster Poindexter November 25, 2016