stand up against (someone or something)
To actively defy, confront, or oppose someone or something. Political leaders from around the world have vowed to stand up against the dictator's brutal regime. We need to stand up against these big companies that try to run our local businesses out of town.
stand up against someone or something
to withstand or hold one's own against someone or something. He's good, but he can't stand up against Jill. Can this tent stand up against the wind?