earn your keep

Từ điển Oxford Advanced Learner 8th

ˌearn your ˈkeep idiom
1. to do useful or helpful things in return for being allowed to live or stay somewhere
2. to be worth the amount of time or money that is being spent
•He felt he no longer deserved such a high salary. He just wasn't earning his keep.
Main entry: ↑earn_idiom