Fappiest 

The joy and happiness that fapping brings

Shawn was the fappiest person I have ever met

Fappiest by Lil fap January 5, 2021

fappist 

A word used in place of describing someone as a "masturbator" or other term related to masturbation.

One might call someone a fappist if they do not wish to get caught using a common sexual slur.

"Hey, you know Nathan?"

"Yeah; he's a fappist."

fappist by Eg' March 17, 2009

Fappinstance 

Interacting with someone who is masturbating, while you were already masturbating, either in person, via phone call, text, or internet.

I was wandering around jacking off when I walked in on Mike masturbating. He said it was a coincidence, but I think it was just fappinstance.

Fappinstance by Rynokie May 26, 2013