Mountain Rush 

An off-brand soda that is supposedly the same as Mountain Dew, but is produced and manufactured by Shasta and often has a cost that is much less and is a popular choice for many cheap families with up to 5+ children, as well as a plethora of parties that mostly involve the Mexican population. The most common place to find the product is in a .99$ store.

Person 1: Hey, Let us get some mountain rush

Person 2: Cheapass cant afford mountain dew

Mountain Rush by Planet U May 8, 2018

Chocolate Mountain Rush

When a male or female lays done on their back and their partner crouches with their ass in front of the other persons mouth. The person laying down licks their partners asshole untill they eventually start shitting and it gets all over the other persons body. Thus the "Chocolate" starts "Rushing" forming a "Mountain" on the perosn laying down.

dude she totally gave me a chocolate mountain rush last night bro, shit got EVERYWHERE!

Chocolate Mountain Rush by plO` xO0WN4G3 October 25, 2009