The scariest and most powerfull creature ever. The yak is also known as "the one we do not speak of". It stands 8 ft tall and weighs over 400 lbs. It can consume a full grown man in one bite.The YAk is made by crossbreeding Ms. Brix and a mongolian YAK. The only way it can be destroyed is by duncan wielding a pick axe.

THE YAK just ate an entire platoon of green berets
by pankration October 7, 2007
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Question and Answer

-yo, u tryin' to go to Amsterdam next week?
-o yak... i'll even pay for ur ticket!
by wtf2u December 5, 2010
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A commonly used acronym for ''You Already Know''.

Can be used in any situation and is very versatile.
ex.1- ''YAK I'm about to be on a phat come up tonight!''

ex.2- Person 1: ''Nigga I'm straight fucked the fuck up!''

Person 2: '' Tah, YAK!''

ex.3- Person 1: ''You gonna hit up that Andre Nickatina concert er wut?''

Person 2: ''YAK!''
by xomonieeeee March 21, 2010
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One's girlfriend or wife. Usually used as a casual term of affection. Popularized by fans of the band Ween, as used on the EZ Board BBS dedicated to Ween. Such users generally attribute Buttsled as the father of the term.
"Last night the yak and I didn't do much, just drank some beer and listed to The Pod."
by JDeluxe February 26, 2005
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1. To talk most indefinitely
2. To reveal one's lunch after eating.
3. The designation of plane types for the Yakovlev company, a Russian plane designer.
1. Marlene been yakking with her friends in class for the past hour!
2. Billy just yakked all over the floor!
3. The Yakovlev air wing designs planes with the designation Yak-#.
by Boosher May 20, 2005
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A word primarily used to describe the act of throwing up. However, it can be used in many other contexts which may or may not make sense.
Andrea Conners makes me wanna yak.
by bjd09 February 2, 2009
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