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!
2👍 1👎
A container or bag in which to throw up in after heavy drinking
Toss me the yak sack, that handles coming back up
1👍 1👎
The point when your sack touches the cold water, when walking into the sea.
"RAAAAAAH!!11"
-"..."
"OMG DUDE! RAGING YAK IN THE SACK!121"
5👍 4👎