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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
vagina, twat, or pussy
In norway people call it a moose.
Don't be a moose.
by you're losing! January 02, 2009
a big fuckin animal...
Ryan: Wow, thats a big fuckin animal.

Izabel: Don't you mean a moose?

Dan: Izabel, why can't you stop sandbagging people!?

Chris: BALLS!!!
by Jesus Christ Jr. April 19, 2008
Moose is an adjective that is used to describe someone you show affection towards. This can be used in reference to an event that reminds you of how cute, adorable and perfect this person is. It can also represent dissapointment if spoken in a lower tone.

The term "moose" can also be used to replace the term "i love you". (see examples).
In context to a situation it can be used the following way.

"moose your so cute"

When applied to someones name

"alex your a moose"

Due to its hidden meaning of "i love you", it can often just be said on its own, at the begining and ending of conversations.

by bill chambers November 26, 2006
1)n. A Canadian quadra-ped woodland creature, has antlers but loses them every summer
2)n. someone who is crazy, or just said something or did something crazy
3)adj. discribing someone who resembles def.2
4)v. to play video games, to make cookies (or bake in general), have sex
1)The other night i almost hit a moose.
2)Did you see him dancing? hes such a moose.
3)That was such a moose thing to do.
4)Last night i moosed with your sister. (figure that one out haha)
by Moose face...cakes November 20, 2005
The best dog that will ever live. He enjoys playing with milk bones as if they were alive and is really the whole family's pet. He can pass some serious gas and then just turn back and look at you as if you were the disgusting one. And Moose really loves the b***hes and will do anything he can to find them. Moose also does this cute head tilt when he is trying to figure something out like a noise or decide whether he should bark.
The neighbor showed up at the door with a box of puppies and said, "these belong to Moose"!
by 210940 February 06, 2010
An action involving inserting both thumbs in a womans anus with remaining fingers spread wide across her butt cheeks. Results in something that resembles moose antlers.
Dude, while that ho bag was going down on you in the limo, I moosed her. slut.
by Panic in my pants! May 07, 2009
To Moose - a verb used to describe a sexual act in which a man places both thumbs in the anus of a female and spreads his other fingers wide over her butt cheeks. The resulting effect resembles moose antlers.
Pat: "I cant believe you moosed that stripper in the back of the limo"

Jake: "Her ass was in my face the whole time she was giving you head, what else was I suppose to do?"
by the only tigger December 05, 2008