muck in

Từ điển Oxford Advanced Learner 8th

ˌmuck ˈin derived
(BrE, informal)
1. to work with other people in order to complete a task
•If we all muck in, we could have the job finished by the end of the week.
2. to share food, accommodation, etc. with other people
•We didn't have much money, but everyone just mucked in together.
Main entry: ↑muck_derived