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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
The name of a person that you've met before a dozen times, but you forget their name, and when you ask someone that knows his name, they exploit your forgetfulness, by giving you a most ridiculous wrong name.
I remember meeting him before at Adam's bachelor party, but I forgot his name.

Oh, that's MOOSE.
by SovietTugBoat May 02, 2010
someone that has an attractive head but a bad body. with a moose you hang the head on the wall and not the body.
person: hey what do you think of that chick

2nd person: ah she's a fair moose
by chicekn April 10, 2010
the singular form of "Meese"

it is a animal that is seemingly harmless, but actually carries a knife...
Person 1: awwwww look at those meese, i think ill pet that moose.
by those two December 13, 2009
Plural: Moosen
The most awesome animal/beast that exists on the Earth. They could beat up a shark, shoot a terrorist from 5 miles away, and reduce your mortgage payements all at the same time! Although they are very awesome, they are still friendy creatures. Until they attack you.
Yo dude! You see that moose rip that shark's jaw apart?!

Yeah, and he also reduced the time it will take to pay off my house and/or car by 3 or more years!
by Moose Mahn September 17, 2009
awesome; amazing; unbelievable
"dude thats so moose"
by broken killer March 02, 2009
What a Canadian writer, or poet, or other challenged artisan consults for inspiration.
Sometimes misspelled as Muse.
Awww, Eh... Like I'm stuck... I gotta consult my Moose, eh...
by Crow1670 February 03, 2009
The world's greatest animal. If you are called a moose, you should feel praised and loved. Moose are generally brown and have antlers. They have a leader named Mr. Moosey, if you like like, don't mess with him.
Person A:You're a moose

Person B: Why thank.

Person A:But you're ugly

Person B: Mr. Moosey! Kill him!

Person A is dead
by Incogneto April 13, 2008