Spontaneous Butthole Evacuation Syndrome 

Some people's buttholes just fuckin fall off randomly. This happens a lot in Norway.

I was diagnosed with Spontaneous Butthole Evacuation Syndrome

Spontaneous Butthole Evacuation Syndrome by The Gulath Clan March 7, 2019

spontaneous dental hydroplosion

When your teeth turns to liquid and drips down the back of your throat.

When your assistant to the regional manager at your work asks you to fill out an anonymous paper with diseases or disabilities that you would like covered in your health care plan- write down spontaneous dental hydroplosion in case your teeth turn to liquid and drips down the back of your throat.

spontaneous dental hydroplosion by scubathugsteve April 26, 2005

Spontaneous shitting 

When you have a big juicy Five Guys cheeseburger and 45 minutes later you shit yourself in the most embarrassing situation. This usually happens when the burger is made with jalapeños and hot sauce.

Last night I was hanging with Carol, and just about as I was ready to stick it in, I had a spontaneous shitting. It was all over he place. She laughed.

Spontaneous shitting by Fnseriousdude April 20, 2010

spontaneous head 

Oral sex that is not requested, expected or prepared for. Common traits of the receiving parnter usually include shock and awe followed by extreme happiness.

Brendan was only on a second date with this girl, but when she came with the strong spontaneous head after dinner, he fell in love.

spontaneous head by Zack, Spontaneous Head Fan January 2, 2010

spontaneous dentohydroplosion 

When one's teeth turn to liquid and then drip down the back of one's throat.

"The Office" - Health Care (2005)
Jim Halpert: Wait, what are you writing? Don't write ebola or mad cow disease, all right? Because I'm suffering from both of them.
Pam Beesly: I'm inventing new diseases.
Jim Halpert: Oh, great.
Pam Beesly: So, like, let's say that my teeth turn to liquid and then they drip down the back of my throat. What would you call that?
Jim Halpert: I thought you said you were inventing new diseases? That's spontaneous dentohydroplosion.
Pam Beesly: Nice.

spontaneous dentohydroplosion by Zak Kim January 20, 2007

spontaneous vagination 

To suddenly and without warning grow a vagina. See also, depenisification.

"Hey, wasn't Chris supposed to show up tonight? Where is he?"
"I don't think he's going to show, looks like another case of spontaneous vagination."

spontaneous vagination by crunchyk9 May 11, 2008

spontaneous erection 

The boner you get for no reason at all, usually happens during non-arousing times, such as english class or a funeral.

dang did you see how jim was walking? I think he was hiding a spontaneous erection.

spontaneous erection by ricky warden June 11, 2006