"that Tommy is a crusty finger fungus butt"
by Peter Rothe March 6, 2008
A Crusty Finger is when the toilet paper splits and your finger passionately pierces your rectum, and you forget to wash your hand so the poo becomes crusty.
by ISadlyHaveNoLife February 23, 2016
When someone uses their dirty and scabbed hands to perform secual gratification in return for goods or services. No lubricant is used and typically the scabs from the 'Duster' will fall onto the genitalia of the person they are dusting
Dude, Lauren is outside of Pilot giving a Crusty Finger Duster for a pack of cigs and enough gas to get home.
by MadDawgShorty July 30, 2021