Originated by GI's in Japan. Moose is GI slang for the Japanese word Musumei which means girl. Some Japanese girls use it as slang for theri vagina.

Properly spelled Musu

My wife is Japanese this usage goes back 60 years
GI to another "You should see my little moose".
by Otiose January 30, 2008

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When an individual acts brotherly/best-friends only to disappear permenantly for the love/lust of a woman is considered as being a "moose".
Ya! man, Mustafa was a brother but he turned out to be a "Moose".

Hey! Where is Mustafa these days? Don't Ask! He pulled a "Moose".
by Black Hawk, Knight Hawk November 19, 2010

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a slang for the female genitalia, getting its use from the internal female reproduction organs resembling a moose or some other type of horned creature.
oh my gosh, the female reproduction totally resembles a moose!
by dinosaur16 September 20, 2010

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A mammal that likes to have sex with women on craigslist.
Did you hear about the Moose on the news that got shot by a hunter when he found out the Moose was having sex with his 12 year old daughter?
by Chicken42017 September 15, 2010

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A female with a larger than normal rack size, A female thats breasts appear to be the size of a moose!
Kale: Hey Jay! Look at that girls chest

Jay: Haha! Yes! its a moose!
by Rageofnoobs September 10, 2010

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A large, ungainly girl (tall, well built than fat) who appears a bit dumb and/or clutzy, not particulary attractive. Or perhaps a girl who is a bit too big to be completely feminine, like Kimora Lee Simmons. Basically a girl whose physical presence is vaguely reminiscent of that hulking, slow-witted animal, the moose, which lacks the grace of something like a stag.
That girl is a real moose!
by ManofG February 07, 2009

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A moose is another word for whore. A way to describe a slut. Can also be used as "Moosie".
Friend 1: Damn that girl is good looking

Friend 2: Yeah dude, but I bet she is a total moose.
by Nick, Cordell, Ian January 25, 2009

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A gram or more of weed.
Hey could I get a moose of ya?
by Barnacle Boy November 07, 2010

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