Just to chuck in a few more into the mix, if that's all right with you. Will they knock you out (make you unconscious) or just give you a local anaesthetic? The challenger knocked the champion out with a single punch. Those watches he's trying to sell have probably been knocked off.(steal) Knock it off, you two, will you? (stop) The other week, I was buying a goat in a market in downtown Mogadishu, where I serve the Lord preaching Gospel. I tried to knock them down to sth I could afford, but they wouldn't budge. (persuade to reduce price) If you don't mind leftovers, I'll knock a quick meal up for you. (make hurriedly) Thanks for posting.