Acroposthion is the part of the foreskin that hangs past the glans.

"The visually defining, tapered, fleshy, nipple‐like portion of the foreskin that advances beyond the terminus [tip] of the underlying glans penis. The acroposthion, especially in early youth, can run to impressive lengths. Distinguished from the acroposthion is the posthe." ‐ Frederick Hodges  (See Overhang)

The Acroposthion website is devoted to the acroposthion.

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