Definition of do (someone) a favor
- You can do your uncle a favor by giving him a ride.
- Do me a favor, please, and help me move this.
- Do me a favor and get home on time for once.
: some person : somebody
: friendly regard shown toward another especially by a superior
: approving consideration or attention : approbation
: to regard or treat with favor
: to do a kindness for : oblige
What made you want to look up do (someone) a favor? Please tell us where you read or heard it (including the quote, if possible).