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1. sourdough
a true or veteran Alaskan
"He's a real sourdough; he hikes, fishes, kayacks, and loves could weather."
by Dana Mix Aug 17, 2003 add a video
2. Sourdough
When a girl puts her yeast infection pus in a man's mouth as an act of sexual intent.
I sourdoughed my girlfriend yesterday, my tongue turned yellow afterwards.
3. sourdough
A nickname or descriptor for a woman who doesn't clean her vagina to the point where yeast infections along with many other diseases and crotch-rot are simply assumed.
"Man, she was really bakin' a loaf of bread down there.
Yea, I bet it was a loaf of sourdough."

"That bitch, Sourdough, gave me a UTI. :<"
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