chip in
US /tʃɪp ɪn/
UK /tʃɪp ɪn/

1.
凑钱, 出力
contribute something, especially money, to a joint fund or effort
:
•
Everyone decided to chip in for a gift for the boss.
大家决定凑钱给老板买礼物。
•
If we all chip in, we can finish this project faster.
如果我们都出力,就能更快完成这个项目。