yellowstone 

An enormous Supervolcano which houses an incredibly huge magma chamber deep underground which is several miles across and is just waiting to erupt and blow our sorry arses into the next world. Will most likely happen when some 3 billion people are having a coffee break or having a toilet break.

Joe: The sky is dark, its snowing in the middle of july and my home has collapsed from mountains of volcanic ash crushing my piles of porno mags.

Mike: oh well, Yellowstone has erupted. The end of the world has to start somewhere.

yellowstone by wierd brained emo kid August 7, 2006

Yellowstone 

The first national park in America. The bison will gore you, the bears will eat you and the park service will treat you like a moron.

Yellowstone is an incredible wonder, an awesome place. I will, however, never go there because of how horribly Xanterra treats their employees.

Yellowstone by Poofter June 24, 2005

yellows 

Another word a pill containing 10 mg. Of hydrocodone and 325 mg. Of acetomenophin. Also called Norco

{Ring ring}
"Bueno"
"Whatsup with the yellows?"
"Tomorrow."
"Cool save me a hundred."
"Fo show, peace."
"Lates."

yellows by Dr. Todd Reezee February 4, 2009

Sunny Custard Yellows 

Not being afraid and knowing exactly why you are not afraid.

...the greens are because you're not getting fat or because it's been clear skies too long. You're just happy, that's all. The sunny custard yellows are amazing. Suddenly you're not afraid and you know what you're not afraid of.

Sunny Custard Yellows by stefawesome January 24, 2010

Yellowstone National Butt Geyser 

The insertion of one's penis into an anus (male or female), followed by the expulsion of urine, rather than ejaculate, into the anal cavity.

She's going to know that she got a Yellowstone National Butt Geyser, once she realizes I had asparagus for dinner.

Yellowstone National Butt Geyser by bonerchugger6969 December 6, 2010

Yellowstone Effect 

The effect if yellow stone volcano was to erupt, causing the world to end being covered in clouds of ashes

Did you see that discovery documentary! Cause if you did im damn well afraid of the Yellowstone Effect!

Yellowstone Effect by Chris-bearer July 8, 2009

yellowstone geyser 

when a girl is jerking you off and you cum in the air and the girl has to catch it in her mouth

Yeah me and mrs.carter were doing a Yellowstone geyser on Tuesday

yellowstone geyser by urgrandpais2hot4u November 24, 2009