do someone a favour

do (someone or oneself) a favor

1. To help someone else, typically at their request. Sometimes used sarcastically. Hey, do me a favor and take these bags into the kitchen while I get the others from the car.
2. To do something to help or better oneself. In this usage, a reflexive pronoun is used between "do" and "a." Do yourself a favor and go to college—now that I'm older, I regret not having that experience. Because I knew that I had to get up at 4 AM today, I did myself a favor and went to bed early last night.
3. A request for someone to stop doing something bothersome or annoying. Can you please do me a favor and take your loud music somewhere else? I'm trying to sleep! Look, I know you want to help, but do us a favor and just stay out of our way.
4. A response to a statement that the speaker finds ridiculous or stupid. ("Favor" is usually spelled "favour" in British and Australian English.) Primarily heard in UK, Australia. A: "Katie seems nice." B: "Oh, do me a favour—she's one of the cattiest girls in school!"
See also: favor
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

do someone a favour

do something for someone as an act of kindness. British informal
See also: favour, someone
Farlex Partner Idioms Dictionary © Farlex 2017
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