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Girl on Boy action when the girl places the mans penis between her mountanious boobs and slides up and down his body.
Yo bro i got a sweet mountainvalley from that bitch after my lax games

Yo bro did you take advantage of her and mountainvalley the milk out of her
by FAOTHEFiD December 22, 2011
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Aug 4 Word of the Day
Lying flat refers to a defeatist lifestyle in Chin, where people stop working, desiring material acquisition, and tap out of any social life ā€“ sometimes for good. By lying flat, young people are participating in a kind of non-cooperation movement, rather than surrendering themselves to China's oppressive work culture where they see little hope of social mobility.
Iā€™m not going to try to get a better job so I can afford to start a family, Iā€™m just lying flat.
by Freeo11 June 04, 2021
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2
A high school that is extremely below average, whether it is in athletics or just general living.

Located in Rumford, Maine, Mountain Valley harbors a serious grudge against Cape Elizabeth High School students simply because their football team's skill greatly surpasses that of Mountain Valley.
Who the fuck goes to Mountain Valley anyway?
by Mointain Valley-goer February 18, 2009
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