Shabbatai HaKohen - Wikipedia. Shabbatai ben Meir HaKohen (Hebrew: שבתי בן מאיר הכהן ; 1621–1662) was a noted 17th century talmudist and halakhist.He became known as the Shakh (Hebrew: ש"ך ), which is an abbreviation of his most important work, Siftei Kohen (Hebrew: שפתי כהן ) (literally Lips of the Priest), and his rulings were considered authoritative by ...