1.Another expression is "hold your tongue." It means to be still and not talk.
hold your tongue 保持缄默
Hold your tongue, you disrespectful old bird!
住嘴!你这没规矩的老鸟!
Why do you keep chiming in? Hold your tongue!
你为什么老是插嘴?给我住嘴!
2.The expression "hold up" has several different meanings.
hold up 举起;阻挡;拦截
Mills have iron pillars all over the place holding up the roof.
工厂里到处都有铁柱子支撑着屋顶 。
Why were you holding everyone up?
你为什么要耽搁大家?