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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 "new" word for more then one moose. made possible by morgan.
There was many mooses crossing the road in colorado.
by morgan dufoe August 12, 2006
(adj) Anything resembling a vagina or having qualities thereof.
I can't look at taco's from straight up anymore. It makes me feel sick.
Too moose for you, huh?
So fucking moose.
by Jjef April 14, 2010
Descriptive -

Moose - 1. An incredibly aesthetically challenged woman.

2. Not exclusively, but often also a grossly overweight lady, who's tight leggings struggle to harbour her morbidly obese, gargantuan thighs.

A Lady Moose has an appearance so grotesque, that bystanders often feel symptoms of nausea and general sickness brought about by any sort of prolonged sighting.
Johnny catches a glimpse of an apparently normal looking lady from behind, sporting a glamorous curled hair style just before she makes an about turn to head off the bus.

"Why this lady looks pleasantly normal from behi...Ohhhh naaa, man, naa, naa man she's a MOOSE, what a MOOSE!"

by I like Toast, the most. October 14, 2009
A group of females that go to several nightclubs a week, are loud, annoying and enjoying letting people know there whereabouts (at the particular nightclub) on social network websites such as facebook, twitter or myspace.
'They are the biggest bunch of mooses'
'Where did Jesse go?

I think he left with that moose'
by Ivan Milat III April 12, 2011
1. a large, tall or heavy person of either gender: a fat and/or homely woman should be more properly called a 'cow' (conventional slang)
2. any large animal or thing (colloquial)
1. That 6' 5" 375 pound lineman is a real moose!
2. My German Shepherd dog is a MOOSE 150 pounds!!
That Kenworth truck is a moose for size!!
by Jon64Bailey June 21, 2009
A wild animal with a dick the size of jeremys leg
Plural Meeses
by SwankHalo May 13, 2014
A very beautiful girl with a bright personality. Shy on the outside, and very conservative. Gorgeous, sexy and outstanding !! Loving and kind. With a personality of gold. She's an amazing lover ;)
Guy: did you see moose today ? Guy #2: Yeah she's FIINEE!!! I'd tap that. Girl: Sorry boys... shes my moose!
by ArtistTrappedWithin November 23, 2011