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Frank was under the impression that he was going all the way with Doris, all she let him do was knuckle dunker her .
by DoubleD1! June 04, 2018
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Someone who reaches in between their legs, while sitting on the toilet, to wipe their butt.
β€œWhile Tyler was wiping, he reached in between and dunked his knuckles in the stinky stu water; he’s a knuckle dunker β€œ
by Notta-knuckle dunker May 23, 2018
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