What is Mountain Goat?
1.
When men assemble in a human pyramid, but put their testicles and dick through their legs so it looks like a goat. Hence, mountain goat is a mountain of people in this 'goat' position. It is often done inside a room and used to shock a person walking into the room.
We mountain goated that one kid so bad
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2.
The male equivalent of cougar.
"Man, check out those mountain goats moving in on that pack of cougars."
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