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1.
When a woman acquires a yeast infection and must be avoided by all men.
I started to go down on her, but she was in yeast mode... so I got the hell out of there.
by XxXmaximumXxX March 22, 2011
 
2.
Noun

1. When a woman has a yeast infection with crowd dispersing aroma and pubic hair resembling the dreadlocks of Marshawn Lynch.
"After the game, we got through the crowd pretty quickly. It's a good thing my girlfriend was in yeast mode."
by billebllunt December 09, 2013