spotanus 

A woman (or man) who is always ready for anal sex right on the spot

I want a girl who can be spotanus!

spotanus by CloudyDe August 25, 2013

Spontanus

Noun

1. A portmanteau of the words "spontaneous" and "anus", it's a term used to describe shitting your pants suddenly and without warning.

"Please stand back, I just ate a hot mayonnaise sandwich and it might get spontanus up in here."

Spontanus by billebllunt February 12, 2014

spontanus combustion 

its when your ass, spontaniously bursts into fire

Person 1: Oh no my ass just burst into fire for no reason at all.
Person 2:Why Thats Spontanus Combustion.

I Think I Just Spontanusly Combusted

spontanus combustion by Tangavitch May 15, 2007