A very large, girthy penis. Well above average. Generally, those classified as having a “horse cock”. Known to induce the gag reflex of the person or persons performing oral gratification and also for pounding the cervix of female partners.
Rachel was choking and slobbering all over my gag bone.

My gag bone was pounding her cervix. She said no body has had a gag bone that can beat her guts like mine.
by Eaton Holgoode May 8, 2018
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