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A well aged, but not old, vagina that one encounters once in his/her lifetime. A distinct smell accompanies you and your belongings for an indefinite amount of time, usually days but if your lucky, weeks. Mossyjaw has been studied and test results have conclusively returned the following: 1) The fragrance/odor can't be removed with scrubbing pad and detergent alone. BLEACH MUST be used with the recipe. 2) Some may encounter post traumatic stress disorders after experiencing a good batch of the M-jaw (street slang). 3) If properly handled Mossyjaw can be a positive and life changing event in one's life.
I didn't see it coming, but just as her panties came down I understood with contentment that I was all up into some Mossyjaw. I scrubbed the next day for hours but that stuff wouldn't come-off, even with ajax and sos pad! M-jaw for life!
Mossyjaw by Kalibama December 25, 2009

Moosejaw 

A word used to describe a relatively wide and wet vagina which would look similar to the inside of a moose's mouth. Would be used as an insult directed to a female who is a whore, a slut, fat, or simply has a wide vagina.
"That moosejaw has definitely been pounded more than once!"
"You don't wanna sleep with Emma, she has a moosejaw...you can fist her and she wouldn't feel a thing!"
Moosejaw by I don cah September 30, 2011

Order of the Moosejaw

A fraternal brotherhood founded in Washington, DC in 2005, named in honor of the founding principles of the fathers of Saskatchewan. Most honored be Their names that They shall not be named.
"Hey, what do you believe when it comes to politics?"

"It's hard to explain. I'm a member of the Order of the Moosejaw."
An old lady's vagina.
Dude! I did your grandma last night! Her moosy is SO hairy!
Moosy by Jingle Pants October 2, 2009
1. To have a wee nosey

2. To snoop somewhere

3. Take a gander to
If you take a wee moosy over there you'll find some muffins
moosy by Narcissa_Shax July 1, 2008

moosejaw 

A sexual act during which the male's mouth is completely open and is placed over the vagina while humming.
Guy: Bro, last night I moosejawed my girl and she fucking melted!
Other guy: Dang, I should try that on my woman!
moosejaw by analqueen2k15 January 25, 2016