pitch in
• vigorously join in to help with a task or activity.
• "we must all pitch in and do our part"
Similar:
help out,
help,
assist,
lend a hand,
join in,
participate,
play a part,
contribute,
do one's bit,
chip in,
cooperate,
collaborate,
muck in,
get stuck in,
• contribute something.
• "donors had already pitched in $27 million to meet humanitarian needs"
