pull your weight
US /pʊl jʊər weɪt/
UK /pʊl jʊər weɪt/

1.
自分の役割を果たす, 貢献する
to do your fair share of work or contribute equally to a task or effort
:
•
Everyone needs to pull their weight if we want to finish this project on time.
このプロジェクトを時間通りに終わらせたいなら、全員が自分の役割を果たす必要があります。
•
He's not really pulling his weight on the team.
彼はチームで本当に自分の役割を果たしていない。