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The act of simultaneously of giving a blowjob to one person while taking a shit on someone else, while being shot up with heroin. Can be done with 3 people, but better with 4.

Fun fact: While this is all legal in San Fransisco, chewing tobacco is not.
Dude, did you see those those 4 homeless guys doing the San Francisco Sourdough on the corner back there?
by 2TiredMinds October 20, 2019
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Apr 22 Word of the Day
When you eat dirt for the first time and leave your family to build a shack in the woods
Bro since I got dirtpilled on Tuesday I have made sooo many worm friends and made them soo many little houses to get married in. Me? Lonely? No you’re the lonely one u lawn owning freak
by ecogoth December 30, 2020
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2
A gay sex act in which you have casual oral sex with a person suffering from a yeast infection of the mouth
How was last night?

Yeah... I gotta see the doctor. Last night I fucked Daniel in his hot, wet, yeasty mouth.

Hey man, isn't that called a San Francisco sour dough?

Yeah
by Ericsegall April 03, 2021
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