A bag (preferably brown paper bags) that you bring to a given place or event when you know you're gonna vomit.
Kennedi: if you're gonna yak, please don't do it on the seats of the car
Carly: don't worry I brought my yak sack!
by CHARLITTTTTTTTTTT September 15, 2017
Get the Yak Sack mug.
A container or bag in which to throw up in after heavy drinking
Toss me the yak sack, that handles coming back up
by Americaferlyfe120 April 2, 2011
Get the yak sack mug.
The point when your sack touches the cold water, when walking into the sea.
"RAAAAAAH!!11"
-"..."
"OMG DUDE! RAGING YAK IN THE SACK!121"
by BAFNEQUE November 15, 2009
Get the Yak in the sack mug.