stick up for (someone or something
To defend or show one's support for someone or something. Thank you for sticking up for me back there. It just felt like everyone was against me. We'll never make any progress if we don't have anyone in congress sticking up for our cause. Stick up for your little sister, OK? That's your job.
stick up for someone or something
to support someone or something; to speak in favor of someone or something. Everyone was making unpleasant remarks about John, but I stuck up for him. Our team was losing, but I stuck up for it anyway.
stick up for
To defend or support.