Calvincest 

The act of loving one's sister in an inappropriate or illegal manner.

Calvin was accused of Calvincest by piarr.

Calvincest by Kleenex February 6, 2005

Calvinist 

Someone that partakes in mischievous behavior like the character, Calvin from 𝘊𝘢𝘭𝘷𝘪𝘯 𝘢𝘯𝘥 𝘏𝘰𝘣𝘣𝘦𝘴.

Susie’s firstborn is acting like such a Calvinist!

Calvinist by Mr. Dick Shinary March 19, 2022

Calvinest 

A person whos' religion revolves around playing Halo all day long. Common language is usually very racist in nature. Usually one who is a Calvinest is extremely homophobic and cannot accept that video games are not real.

That dude is a Calvinest!!

Calvinest by anon February 26, 2004

Black Coffee Calvinist 

In Christian theology, another title for a strict five-point Calvinist.

That Black Coffee Calvinist attends a Reformed Baptist Church.

Black Coffee Calvinist by Orebank Bus Rider October 29, 2023