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1.
when one gives oral sex to a women when she has a yeast infection.
Ew, did you guys hear that Sam gave Nancy a yeast feast?
by pinkpancacke December 27, 2013
 
2.
The act of performing oral sex on a woman suffering from thrush
You could have told me beforehand. I've just had a right yeast feast down there!
by Tykezilla December 02, 2010