A woman in her 50s or older trying hard to score younger men while pretending to be younger than she is ie. The next stage of being a Cougar
Its 2am and there's a Mountain Lion on the hunt... She's out for mount'n younger men and lie'n about her age... a Mountain Lion.
by Incorrigible_66 October 4, 2021

A way to be all encompassing of alpine downhill sports. As it is uninclusive to say hey let's go skiing when others snowboard.
Person 1: hey let's go skiing
Person 2: excuse me, I snowboard
1: oh I'm sorry bud, let's go mountain downing
Person 2: excuse me, I snowboard
1: oh I'm sorry bud, let's go mountain downing
by adjectivesnoonoo January 28, 2018

A literal pile of weed.
If you can hide an average-sized dog under your weed, you have a mountain of weed.
If you can hide an average-sized dog under your weed, you have a mountain of weed.
Ayo, let's go to Wiz Khalifa's this Saturday, I hear he ordered a mountain of weed and he's willing to share.
by TheChairHugger November 9, 2013

Another way of describing when your penis becomes erect and pushes upward against the crotch of your pants, also known as pitching a tent, standing at attention, morning wood and rising son
by Metallicajunkie October 23, 2018

(n.) Used primarily with waking up. Generally, it is a girl with a unshaven pussy or beaver that has let it grow a little too much and thusly become a small mountain of pubic hair. Should be used with the adjective of color describing the girl's hair.
Coleman: Hey Vince, I didn't see you last night, what happened I thought you were my ride from the party?
Vince: Ahh Coleman man, I'm really sorry i woke up this morning in Brown Bush Mountain.
Coleman: Sara or Rachel?
Vince: Sara, man!
Coleman: ...I Understand completely...On a side note though...NICEEEEEEEEE
Vince: I KNOW RIGHT?
(High Five)
Vince: Ahh Coleman man, I'm really sorry i woke up this morning in Brown Bush Mountain.
Coleman: Sara or Rachel?
Vince: Sara, man!
Coleman: ...I Understand completely...On a side note though...NICEEEEEEEEE
Vince: I KNOW RIGHT?
(High Five)
by VMcG May 31, 2011

Damn dawg, that 22 year old ginger boy is getting his dick wet hella deep in M.I.L.F. pussy; he must have Mountain Fever.
by Lehetinu September 26, 2021
