knock off phr v informal 【非正式】 1 [I] to stop working 停止工作; 下班: We knocked off at about 5 o'clock. 我们五点钟左右下班。 2 [T knock sth ↔ off] to reduce the price of something by a particular amount 从价钱中减去，削价: I got him to knock $10 off the regular price. 我使他按正价减价十美元。 3 knock it off!spoken used to tell someone to stop doing something annoying 【口】 够了！ 别再烦了！