Feminine of a derivative from shaphak; a pipe (for pouring forth, e.g. Wine), i.e. The penis -- privy member.
see HEBREW shaphak
H8212. shophkah
שָׁפְכָה noun feminine male organ (as fluid-duct); — absolute שׁ ׳כְּרוּת Deuteronomy 23:2 ("" מְּצוּעַדַּֿכָּה).