pitch in
US /pɪtʃ ɪn/
UK /pɪtʃ ɪn/

1.
contribuir, ajudar, colaborar
to join in and help with an activity or task, especially by contributing money or effort
:
•
Everyone pitched in to clean up the park after the festival.
Todos contribuíram para limpar o parque depois do festival.
•
If we all pitch in, we can finish this project by tomorrow.
Se todos contribuirmos, podemos terminar este projeto até amanhã.