The insertion of a hand into an anus, forming a fist, and wrenching in a back-and-forth motion similar to the act of turning a doorknob.
A. "Grandpa gave me a Duluth door knob last night!"
B. "My butthole hurts this morning" "Did she give you a Duluth door knob?"
C. "You have to start with a finger or two, you can't jump right into gettin Duluth door knobs!"
by pancho88 June 28, 2011
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