Mountain Moo 

A tasty, yet curdling concoction of Mountain Dew and Milk.

Hey dude, you want some Mountain Moo?

Mountain Moo by Edan October 14, 2004

Mountain-ass 

noun, the medical condition experienced by female ski resort season-workers wherein rapid and protracted intake of high-calorie, often fried foods (usually justified on the grounds of perceived increase in physical activity) causes expansion of a formerly attractive posterior beyond normal dimensions.

Dude1: Man, this season was too f**kin' ace, but I'm looking forward to rotating back to the world and seeing some girls without mountain-ass.
Dude2: Quite.

Mountain-ass by bombdog January 21, 2009

mountain tornado

Mountain tornados occur when a funnel cloud develops into a tornado near the base of a large mountain. The rotation of the tornado in such close proximity to the mountain causes a scientifically unexplainable process that forces the tornado up the side of the mountain until it reaches the top. Once at the top, the speed of the tornado accelerates until the tornado begins to sink into the mountain (like a drill bit). The tornado continues down until completely submersed (it sort of just disappears).

Note: mountain tornados are extremely rare. The only confirmed sighting occurred July 29, 2009 at Cheyenne Mountain located in El Paso County Colorado. The storm caused extensive damage to the Cheyenne Mountain Zoo facilities. Luckily there were no casualties (human or otherwise).

Wow! You should have seen how worried my coworker was during that mountain tornado. Her kids were at the zoo while it was happening! Good thing the zoo staff had enough sense to move the kids into a safe / strong structure.

mountain tornado by Marbles Da Cat July 29, 2009

Mountain Time 

When someone is late for a meeting and the general assumption is they were a) banging someone, b) batin in the bathroom, or c) any other sexual activity, they are said to be on Mountain Time - irrespective of their actual time zone.

Gary: Who are we waiting on?
Gladys: Lefty, again.
Laurence: Darn him. He's always late.
Steve: Bitch is probably batin' - I'll go check the stalls.
Gladys: Steve - language!
Steve: The dude has KY on his desk! He's on motherfuckin' Mountain Time!

Mountain Time by okparts August 14, 2014

Mountain Rules

moun·tain- rüls ~ saying or phrase:

Origin- It's Always Sunny in Philadelphia Season 11 Ep.3 "The Gang Hits the Slopes"

Mountain Rules is the premise that certain things happen on the mountain that have no reason or explanation behind them. Anything and everything goes without question. Let the Mountain work for you and have no shame.

Best used when shouted after an action is performed or something exceptional happens

synonyms-
"Get after it"
"Stay Frosty"
"Send it"

"Holy shit, last night did you see Danny and Ryan jump into the hot tubs naked?"

"Hey man, it's Mountain Rules out here in Keystone"

"Ian just got on stage with Waka and smoked a blunt!"
"MOUNTAIN RULES MOTHERFUCKER!"

Mountain Rules by dirtyskibum69 December 6, 2018

Mountain Boarding 

The coolest sport ever. More kick ass than scooter, skating, and biking combined. It requires a unique skill of balance and agility.

"I'm going mountain boarding."
"You mean the coolest sport ever?"

Mountain Boarding by ngilliam1234 February 23, 2008

mountain dew 

a slang term for bootleg alcohol. they call it that good ole mountain dew, them that refuse it are few

My unlce mort hes awful short, measures bout 4 feet 2. He thinks he giant when you slip hit a pint of that good ole mountain dew.

Ill hush up my mug if you fill up my jug with that good ole mountain dew

mountain dew by Phil Horwitz December 24, 2006