- An imperative phrase used to tell someone to stop doing something immediately.
- Usually implies the action is annoying, disruptive, inappropriate, or harmful.
Explanation
Origin
Cut it out: Originated in American English in the early 20th century. Theories include:
- Film editing: Removing (cutting out) unwanted footage.
- Tailoring: Cutting out unnecessary fabric.
- General sense: Shortening or stopping an action.
Knock it off: Originated in the late 19th or early 20th century. Possible origins:
- Stopping work: Workers knock off at the end of the day.
- Auctions: An auctioneer bangs a gavel (knocks) to finalize a sale and stop bidding.
- Physical action: Literally knocking something over to stop it.
Synonyms & Related Expressions
Alternatives
Slang/Informal:
- Stow it. (Older slang, means stop talking or stop doing something)
- Can it. (Often means 'shut up' but can mean stop an action)
- Chill. (Milder, if the behavior is just irritating)
- 86 it. (Slang, originally from restaurants meaning remove an item; can mean get rid of or stop something)
Vulgar/Emphatic:
- Cut the shit. / Cut the crap. (Telling someone to stop lying, exaggerating, or being foolish)
- Stop fucking around. (Telling someone to stop wasting time or behaving badly/stupidly)
Milder/Standard:
- Could you please stop doing that?
- I'd appreciate it if you wouldn't do that.
- That behavior is disruptive/inappropriate.
Situational Appropriateness
- Informal.
- Appropriate for parents addressing children, between siblings or close friends, or in very casual environments when dealing with annoying behavior.
- Can sound rude, childish, or overly confrontational in professional settings or towards strangers/superiors.
Misunderstanding Warnings
- The directness and implied annoyance are key. Learners should understand these are not polite requests but firm, informal commands often used when patience is wearing thin.
Examples
- *Two kids are poking each other* Parent: Hey! Cut it out, both of you!
- Could you please cut it out with that whistling? I'm trying to work.
- Knock it off! Stop making those noises.
- If you don't knock it off, you'll have to leave.
Dialogue
Context
*Sibling 1 is humming loudly and tapping their foot while Sibling 2 is studying.*
Sibling 2: Can you please knock it off?
Sibling 1: Knock what off? I'm just relaxing.
Sibling 2: The humming and tapping! It's really annoying. Cut it out!
Sibling 1: Fine, fine. Whatever. *Stops*
Social Media Examples
- Comment thread (argument): User C: Okay you two, knock it off. This isn't productive.
- Tweet: To the construction crew starting work at 7 AM on Saturday: CUT IT OUT 😩 #needsleep #noise
- Forum Mod Post: Some users are derailing the thread with off-topic posts. Knock it off, or warnings will be issued.
Response Patterns
- Compliance: The person stops the behavior, possibly looking sullen or apologetic.
- Defiance/Argument: I wasn't doing anything! / Make me! / Why?
- Ignoring: The person continues the behavior, potentially leading to escalation.
Common Follow-up Questions/Actions
After saying Cut it out / Knock it off:
- The speaker might issue a warning or threat (One more time, and you're in trouble).
- Repeat the command more forcefully.
- Take disciplinary action (e.g., separating fighting children).
The person told to stop might:
- Stop the action.
- Ask What? pretending innocence.
- Complain about being told what to do.
Conversation Starter
- No. A command to stop an ongoing action.
Intonation
- Said firmly, often with annoyance, impatience, or anger.
- Stress falls strongly on Cut or Knock.
- CUT it out! / KNOCK it off!
Generation Differences
- Widely understood and used across all generations. They are standard informal commands.
Regional Variations
- Both are common in American English. Knock it off might feel slightly more dated to some than Cut it out.
- Both are understood in other English-speaking regions, though local alternatives like Pack it in (UK/Aus) exist.