Definition

An enthusiast of herpetology who spends their free time seeking out, studying, or keeping reptiles and amphibians as a hobby. These are the folks who get genuinely excited about finding a salamander under a rock and maintain elaborate terrarium setups in their homes. Not to be confused with people with cold sores—totally different thing.

Example Usage

My cousin is such a herper that his apartment has more tanks than furniture.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=herper&defid=5690)