scaredy cat （儿童用语）胆小鬼；易受惊吓的人；受惊的人

【例句】
Hey, are you a scaredy cat? Why are you so afraid of water?
嘿，你是胆小鬼吗？干吗这么怕水？

She was quite literally a scaredy cat.
她是一只名副其实的胆小猫。