Толковый словарь английского языка Oxford English Reference - slog

v. & n. --v. (slogged, slogging) 1 intr. & tr. hit hard and usu. wildly esp. in boxing or at cricket. 2 intr. (often foll. by away, on) walk or work doggedly. --n. 1 a hard random hit. 2 a hard steady work. b a spell of this. Derivatives slogger n. Etymology: 19th c.: orig. unkn.: cf. SLUG(2)