Top Definition
a fanny pack around your waste without straps.

it is the fatlike pouch below a womens bellybutton.
it is filled with yeast juices and you can make paste out of it.
Dalton- " is that lady wearing a fanny pack under her shirt, or is it a yeast sack?"

Derrick- " i think that it is a yeast sack."

Dalton- " i hope it doesnt leak!!!"

Derrick- " if so, then we can make paste from it."
by GIB-10 May 27, 2009
5 Words related to yeast sack

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