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Russian mountain slide 

Where you bust a fat nut in a chicks mouth and it comes out her nose then you proceed to slurp it out
Bro I totally slurped a Russian mountain slide out of Becky

rocky mountain log slide 

When you crap a steaming hot log between a girl's rocky mountains (boobies)
Yo man I did a rocky mountain log slide on my girl last night.
rocky mountain log slide by strdr505 February 28, 2014

mountain side middle school 

Mms is a school full of shitty ass kids who dont know what the fuck they are doing. Literally half the kids vape including the teachers. All them teachers winans are stupid boomers like davis. The school was build 420 years ago in 1769 and hasnt been rebuild since. If you go to the gymnasium you can have atleast 4 people in the open fucking each other and and atleast 1 behind the bleachers. The teachers sell vodka to the kids for a high price of $69. If you want a free juul go to Mountain Side Middle School (.^.) have a great sexy time

was born on a mountainside 

An expression to suggest amazement, it's used when somebody witnesses an event that would never happen in the place that the person came from. In simple words it means to be amazed as fuck.
-Hey dude, look at that pretty-ass girl, I'm so fucking horny!
-I was born on a mountainside

Snowball Mountainslide 

Similar to a limp biscuit or ookie cookie, a bunch of guys nut in a bitches mouth. She then snowballs the first guy that came, he snowballs the second guy, and so on down the line like a snowball rolling down a mountainside. The last guy to have came is the loser and must swallow.
Man my weekend sucked. I got really drunk at a sausagefest and was talked into a snowball mountainslide. I lost so I had to swallow eight guy's man juices.

Mountainside NJ 

Mountainside NJ is a charming town centered in union county. It is the nicest town in union county. It also has the cheapest taxes since their is no high school. Kids don't have anything to do in this town besides "hangout at 711" or drive around in their brand new cars. Most households are two income family's. Everyone in this town thinks their house is worth more than people would pay for it. There is only 5 stores downtown so everybody goes to westfield and considers it their own down town. Mothers have nothing to do but drive around their fancy Volvo or suburban and complete their one task of the day and that is to pick their child up at Deerfield. If you live in mountainside most likely one or more of your parents commute to work in NYC by train or bus. Almost every street in mountainside has at least one poorly build McMansion that will likely concave in the nest 20 years because of the cheap building materials used. If you attended Deerfield middle school god help you because the education system and teachers is best described as poop. If your from mountainside then you will know how many old people are residents of here. The old people walk in the middle of the road causing traffic. Basically mountainside is the breeding grounds for WASPs. Average income in mountainside is about 120,000 dollars but most families are bringing in 200,000 or are living on old money.
Your from mountainside NJ"

"Yes i am"

" You must be a rich ball a shit republican"
Mountainside NJ by Classyman October 15, 2013