scaredy-cat (儿童用语)胆小鬼

【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？

Don't tell me you're a scaredy-cat as well as a scoundrel.
别告诉我你和胆小鬼一样吓傻了。