Top Definition
A fungus that bakers use to make their bread rise.

A fungus that infects womens' vaginas, causing them to produce a cottage cheese-like substance.
The bakery was unable to produce enough bread because of a shortage of baker's yeast.

I ain't gonna fuck my girl coz she's got a yeast infection.
de shdaf09ewrwe 17 février 2003
small, single-celled fungi of the phylum Ascomycota that reproduce by fission and are capable of fermenting carbohydrates into alcohol and carbon dioxide (Webster's).
I baked the bread and waited for the yeast to rise.
How does not using toilet paper make you a slut?
de red dragon 17 juillet 2003
An emphatic word that can be used as an insult or an adjective.
-You stupid yeast!

-That person sure was yeasty.
de BRINBE 5 août 2004
1. Something/someone very big or fat.
2. feeling of extreme laziness.
1. Look at that girl, what a yeast.
2. Man, i feel like such a yeast today.
de Fatkunt 19 octobre 2010
when one is harboring yeast cultures in their twat. I hear yogurt is good for curing such infections. If you don't get these infections checked out it may lead to greater trouble.

Yeast cultures make me itchy.
de sf9999 1 février 2009
Verb. To "yeast" somebody is to have sexual intercourse with said person while having a yeast infection. Recently this has become a mainstream fetish for Asians all across the world. Have you been yeasted?
Asian Girl: Want to yeast?

Asian Guy: Sure, I hear it's a new mainstream fetish.
de Credit 8 juillet 2010
An term used to insult and describe a really ugly looking person, comes from the blending of the lexemes "beast" and "yeti" and means UGLY! or DOG!
Can be used as a noun or as an adjective.
NOUN
dialouge:
Person 1: "hey! check out that person over there"
Person 2: "oh man... YEAST!!!"

ADJ
Person 1: "ey bro did ya see that chick i was danc'in wif in da club?"
Person 2: "fuk bro.. she was yeast"

*ugly person walks past*
YEAST!
de unclekevin.* 7 mai 2008

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