The act of pouring a whole 2 litter of mountain dew into the girls vagina.
I totally gave your mom a mountain douche last night.
by Mr. Dickass February 3, 2007
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When someone who recently had unprotected sex douches using Mountain Dew hoping that the yellow 5 will kill the sperm.
Elizabeth: I can't believe I didn't use protection.
Julie: Don't worry, you should try mountain douching.
by Anhydrous-Caffeine February 25, 2011
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A Douchebag who loves climbing, wearing clothes purchaced from REI, and generally has an outdoorsy air about him.
I saw a mountain douche at the top of Mt Si eating a Cliff bar like an idiot.
by Most Of The Sun August 25, 2010
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1. A song by the band Fecal Dick.
2. What you look like when you drink Mountain Dew.
1. I'm going to dedicate the song "Mountain Douche" to my ex, because he IS a mountain douche.

2. Check out the mountain douche to your right.
by shitstain4 April 16, 2010
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A person who so completely embodies douchebaggery, that he or she can be said to be the pinnacle of douches, in otherwords a "Douche Mountain."
That guys is the biggest asshole ever. Whadda douche MOUNTain.
by Small Peanuts February 26, 2011
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