Top Definition
The act of showing your love for someone with your fists. Usually done to a relative or a significant other, especially a redheaded stepchild.
Guy 1: How is the relationship with your wife?
Guy 2: Not so good, she keeps bitching at me for giving her
redheaded son knuckle kisses.
by Beffy J January 31, 2008
5 Words related to knuckle kisses

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