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knock off

1. To cause something to fall off of a surface by striking or colliding with it, either intentionally or unintentionally. In this usage, a noun or pronoun can be used between "knock" and "off." That's the third time this week that I've knocked a glass off the counter. Please don't dance so close to the table, you'll knock off those papers.
2. slang To stop doing whatever one is doing. Often used as an imperative. In this usage, a noun or pronoun can be used between "knock" and "off," especially in the common phrase "knock it off." Knock it off, you two! I don't want to see any more fighting. I'm going to go tell those kids to knock off all the shouting.
3. slang To copy or imitate a work or good, often without consent. Whoever knocked off that designer handbag did a good job—you can barely tell the difference. He's made a career out of knocking off the classics.
4. slang To produce or complete something, usually with the main motivation of simply getting it done. If we can knock off a few more of these reports before the weekend, we'll be in good shape for next week. I'm just trying to knock off as many pages as possible so I can get up to the page count before the deadline.
5. slang To rob a physical location, such as a store, house, etc. The same guy has been knocking off convenience stores in the area, and police finally think they've identified him. You've got to be a fool to think you can knock off an ATM inside a police station.
6. slang To take a break or stop working for the day. I'm going to knock off around six. You want to meet me for dinner?
7. slang To murder someone. The mob has been knocking off every witness that has taken the stand, so now people are terrified to come forward.
8. slang To reduce a price by a certain amount. Can you knock off a few bucks for an old friend?
9. slang To defeat or eliminate from contention, as in a sports competition. Every year, some underdog knocks off a top-seeded team.
See also: knock, off


1. noun A copy or imitation of a work or good, especially one of poor quality produced without consent. You can find all kinds of cheap knock-offs of designer goods being sold in the tourist district. A lot of critics love him, but I find him to be just another Hitchcock knock-off.
2. adjective Indicating such a copy or imitation. I can't believe you spent $100 on some crappy knock-off Rolex watch. The book is little more than a knock-off Harry Potter.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

knock something off (of) someone or something

 and knock something off
to remove something from someone or something by striking. (Of is usually retained before pronouns.) I knocked the hard hat off of Wally when I hit him accidentally with the ladder. My elbow knocked off the book.
See also: knock, off

knock something off

1. to manufacture or make something, especially in haste. I'll see if I can knock another one off before lunch. They knocked off four window frames in an hour.
2. to knock off some amount from the price of something, lowering its price. The store manager knocked 30 percent off the price of the coat. Can't you knock something off on this damaged item?
3. to copy or reproduce a product. The manufacturer knocked off a famous designer's coat. They are well known for knocking off cheap versions of expensive watches.
4. Go to knock something off (of) someone or something.
See also: knock, off

knock off (doing something)

to stop doing something. Knock off shoveling snow now, and come in for a hot drink. I wish he would knock off practicing for a while.
See also: knock, off

knock off (work)

to quit work, for the day or for a break. What time do you knock off work? I knock off about five-thirty.
See also: knock, off
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.

knock off

1. Take a break or rest from, stop, especially quit working. For example, He knocked off work at noon, or Let's knock off at five o'clock. [Colloquial; mid-1600s] Also see knock it off.
2. Also, knock out. Dispose of or produce easily or hastily, finish, as in A writer of detective novels, he knocks off a book a year, or We can knock out a rough drawing in a few minutes. The first colloquial usage dates from the early 1800s, the variant from the mid-1800s.
3. Get rid of, reduce, as in She knocked off twelve pounds in a month, or They knocked off one-third of the original price. [Colloquial; early 1800s]
4. Kill, murder, as in They decided to knock off the old lady. [Slang; early 1900s] Also see knock someone's block off.
5. Copy or imitate, especially without permission, as in They are knocking off designer Swiss watches and selling them for a few dollars. [Colloquial; late 1800s]
6. Hold up, rob, as in The gang knocked off two liquor stores in half an hour. [Slang; early 1900s] Also see knock the socks off.
See also: knock, off
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

knock off

1. To hit something abruptly and dislodge it or remove it from something else: I accidentally knocked the vase off the shelf as I walked by. Knock off the mud on your shoes before you come in. The low branch knocked my hat off.
2. Slang To take a break or rest: Let's knock off for a few minutes and get something to eat.
3. Slang To stop doing some kind of labor for the day: We knocked off work at noon and went fishing. Let's knock off early today and go out for a drink.
4. Slang To complete, accomplish, or dispose of something hastily or easily; finish something quickly or easily: That author knocks off three books a year. Once we knock the project off, we can eat lunch.
5. Slang To eliminate something; get rid of something: The sales person knocked $50 off the price of the stereo. Knock off 12 pounds in just one month with our exclusive diet plan!
6. Slang To overcome or defeat someone or something: They knocked off the two best teams in the league. They were the better team, but somehow we knocked them off by almost 20 points.
7. Slang To kill someone: The sniper knocked off three of our best soldiers. I was afraid that they would knock me off if I told the police.
8. Slang To rob some place: He went to jail for knocking off a bank.
9. Slang To copy or imitate something, especially without permission: He made a career out of knocking off other peoples ideas. The new car design really just knocks off last year's model.
See also: knock, off
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

knock off

See also: knock, off
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.
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References in classic literature ?
But many a night I did not knock off work until midnight.
If you want to preach, come and take a pick now, and preach when they're resting,' and he did and worked well too, and afterwards when we had to knock off, he preached, and Trent took the chair and made 'em all listen.
Jackson promised to knock Ah Moy's block off if he did not feed the puppy well, while Sigurd Halvorsen, in the forecastle, did his best to knock off Henrik Gjertsen's block when the latter was guilty of kicking Scraps out of his way.
We won't go back to work this afternoon, but knock off now, and call it half a day.
'And now,' said Miss Jenny, 'having knocked off my rosy-cheeked young friends, I'll knock off my white-cheeked self.' This referred to her making her own dress, which at last was done.
If we was to put in another night this way we'd have to knock off for a week to let our hands get well -- couldn't touch a case-knife with them sooner."