Funderstorm 

When you are having so much fun it is out of control.

A brooding thunderstorm of fun.

The party was a funderstorm.
We had a few drinks and before we knew it, a funderstorm was brewing.

Funderstorm by Julian Conaghan October 22, 2010

sunderstorm 

A thunderstorm where the sun stays out the whole time.

Tim: DUDE! It was sunny the whole time it was storming today. There was lightning and everything!

Chase: We live in Virginia, man; we always have sunderstorms.

sunderstorm by Rhetorik April 20, 2009

Dunderstorm 

When it is raining outside, so you decide to spend your entire day inside binge watching The Office.

It's pouring outside, let's have a Dunderstorm in here.

Dunderstorm by Kmoney1795 May 27, 2016

understorm

From LAG.TV, Novawar --

Another term for violently shitting yourself.

Adam: Hey Jeff, that guy had to GG out early. Know why?
Jeff: Why's that, Adam?
Adam: He totally had an understorm. Shit went everywhere. Probably because of that jailhouse c-section.

understorm by shadowdracos January 29, 2015

sunderstorm 

A thunderstorm in which the sun briefly appears in part of the cloud to produce an eerie glow.

We had a sunderstorm that lasted for about half an hour and the mountains in the distance started to look like Mordor.

sunderstorm by pentozali August 10, 2012

Lunderstorm 

A rainstorm in which sudden and simultaneous lightning and thunder (lunder/thightning) is a frequent occurence.

“This is like something from a movie, the whole street just flashed white, it’s a total Lunderstorm!”

Lunderstorm by Jimi E August 13, 2020

Gunderstorm

A violent and uncontrollable expulsion of the bowels that results in a rancid pile of fecal matter and partially digested food.

Sometimes you have to fart after eating Taco Bell and sometimes it turns into a full blown Gunderstorm instead.

Yo, gross, it smells likes a Gunderstorm in here!

Gunderstorm by Andy Overby April 22, 2025