bobstay:

More rarely: bob-stay , a slang word for the frenulum of the prepuce (the fold of skin connecting the foreskin to the base of the glans penis).
Synonyms: banjo-string ; frenulum (of the penis); frenum-(of-the-penis) ; fraenum-(of-the-penis) ; frenum of the prepuce ; frenulum-preputii ; G-string ; Tarzan-chord .

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