Top Definition
The act of inserting one's fist into another's anus while the recipient is urinating. The term is derived from a "distlefink," a small bird whose call often resembles the noise made by the recipient of a fisteldink.
Dave approached the urinal, dropped his trousers, and began to pee while Rahul fisteldinked him from behind.
by luv2fisteldink September 21, 2006
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