pitch in

US /pɪtʃ ɪn/
UK /pɪtʃ ɪn/
"pitch in" picture
1.

colaborar, contribuir, ayudar

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 colaboraron para limpiar el parque después del festival.
If we all pitch in, we can finish this project by tomorrow.
Si todos colaboramos, podemos terminar este proyecto para mañana.