To take a break or rest from; stop:暂停或休息；停止：knocked off work at noon.中午暂停工作
To cease work:停止工作：It's after five; let's knock off.已经五点多了；下班吧
Informal To complete, accomplish, or dispose of hastily or easily; finish:【非正式用语】 仓促写出，即席作成：仓促或轻易地完成、做完或处理；结束：That author knocks off a book a year.那位作者在一年内仓促完成了这本书
Informal To get rid of; eliminate:【非正式用语】 除掉；消除：knocked off 12 pounds in a month.一个月内体重减了12磅
Slang To kill or overcome.【俚语】 杀，战胜
Slang To hold up or rob:【俚语】 持枪抢劫，拦路抢劫：knocked off a bank.抢劫银行
Informal To copy or imitate, especially without permission:【非正式用语】 翻印：复印或模仿，尤指在未经允许的情况下：knocking off someone else's ideas.抄袭别人的构想