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A phrase that's used among farmers that refers to the dirt stain on the side of your fingers that doesn't wash off until winter.
Person 1: Hey have you found any way to get that dirt off your hands?

Person 2: No, that's crud finger, it won't come off until the winter.
by organicintern July 12, 2009
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The smell of shit that can smell particularly strong from sniffing around the fingernails of someone who refuses to wash his/her hands after wiping his/her ass. This is usually due to toilet paper ripping or scrunching up, leaving the fingers exposed to warm shite still stuck in the anus after laying a brick.

Quite often, having longer nails will be more prone to have Crud Fingers as there is more room for feces to get trapped and smell like a grimy toilet bowl but the deciding factor really is washing your hands after dropping a turd.
Person 1: Dude, have you smelt that stench coming from that guys hands?
Person 2: Yeah! I heard he doesn't wipe. He must have Crud Fingers big time!
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by CrudFingers April 24, 2018
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