stick up for
US /stɪk ʌp fɔr/
UK /stɪk ʌp fɔr/

1.
维护, 支持
to defend someone or something that is being criticized or attacked
:
•
You should always stick up for your friends.
你应该总是维护你的朋友。
•
She always sticks up for what she believes is right.
她总是坚持自己认为正确的事情。