[do] {sb} a (favor|solid)
1
to perform a helpful or kind act for someone, typically without expecting something in return
- She was willing to do her friend a favor by lending a hand with moving.
- Let's do him a favor by offering to drive him to the airport.
- He did his colleague a favor by covering their shift at work.
- Doing someone a favor can be as simple as listening when they need support.
- He did his elderly neighbor a favor by shoveling snow from her driveway.