muck in

phrasal verb
1
to work with other people in order to complete a task
همکاری کردن, مشارکت کردن, با هم کار کردن
2
to share food, accommodation, etc. with other people
غذا و محل اقامت را شریک شدن, مشترکاً غذا خوردن, شراکت کردن, سهیم شدن
We didn't have much money, but everyone just mucked in together.