Subtitles section Play video Print subtitles Hello everyone! Welcome to Idiom 100, where we learn 100 commonly used idioms by native English speakers. All of the explanations are in English, so it might be challenging for you, but just try to imagine the meanings in your head and study hard and soon you'll be able to use these idioms in your conversations. Is everyone ready? Let's begin. Hello everyone! Today's idiom is: knock off. Knock off. Okay, so let's imagine you're sleeping and you're so tired and it feels great. And all of a sudden, your alarm clock starts to buzz. Oh, it's so loud and so awful and you knock it off onto the floor and it breaks and it turns off, it stops. Ah, great. Yeah, you knocked off the alarm. Knock off. Alright, so let's listen to 2 examples of how to use knock off. My friend told me I should knock off smoking, what do you think? I can't agree with her more. It's very bad for your health! Alright, so her friend said, 'You should knock off smoking.' You should stop? Okay, let's listen to the second example. Can you please do something about the loud music? Okay, I'll tell them to knock it off! Yeah, it's loud music, so her friend said, 'I'll tell them to knock it off.' Yeah, stop. Okay, so 'knock off' or 'knock it off' means to stop, but it's usually used in a very negative way. Maybe something is very bad or annoying and you want someone else to knock it off. Yeah, and it's not a nice thing to say. Usually, you're very angry or in a bad mood if you tell someone to knock it off. Yeah, maybe your children are fighting all the time, all day they're fighting and finally you get angry and you say, 'If you don't knock it off, you can't have dessert for one month,' or something. Yeah, you're telling them, 'Please stop! I'm angry.' Alright, so 'knock it off' is not something you should use with your boss or to someone you're happy with, but maybe to someone that you're not happy with and something you want to tell them, 'Please stop!' Alright, so be careful when you use 'knock it off' and I'll see you again next time.