Rabbit food (兔食）

This is often used by meat-eaters to describe the food eaten by vegetarians（素食主义者） and those on diets,For example, salads,which often contains lettuce（莴苣） and carrots,are often referred to as "rabbit food" because rabbits eat carrots and lettuce.

Sentence: When are you going to stop eating  that rabbit food and have a proper meal?

Rabbit's foot (幸运符）

 In some cultures ,it's believed that a rabbit's foot has the power to bring good luck to its holder.This belief may stem from the pre-Celtic（凯尔特人的 ）tradition,which considered hunting to be a rite（仪式） of passage for adolescents.Young males were first introduced to hunting rabbits.If they caught and killed a rabbit ,they were awarded one of the hind(后面的) feet of the animal in a ceremony,which welcomed them to manhood within their clan（部落）.

Sentence:We never lose when John is in the team.The guy is a real rabbit's foot.

Like a rabbit caught in the headlights (吓得一动也不敢动）零基础英语在线学习  

Rabbits have a reputation of being rather shy and easily scared.This idiom describes a person who is so frightened or startled by something or someone that they can not move.

 Sentence: He just couldn't defend himself when the gang attacked him.He was like a rabbit caught in the headlights.

Pull a rabbit out of the hat(出奇制胜）

This phrase is linked to the popular magic trick, where a magician amazes the audience by pulling a live rabbit from his top hat.Not surprisingly,the phrase means "to surprise someone by doing something which appeared(or appears) to be impossible".
参考资料：
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