Top Definition
Stemming from the words Sixty-nine and "Om nom nom nom", sixty-nomming is when two people devour each other's genitals with the use of sound effects.
Shana: "Would you mind fingerbanging my pussy next time we sixty-nom? I would sincerely appreciate it."
Jamelle: "No probs babe, perhaps you could glass bottom boat me afterward."
Shana: "Indeed."
by BackPussyLover February 01, 2010

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