chicken 可数名词,鸡
chicken 不可数名词,鸡肉
chicken adj. 胆小的;n. 胆小的人;Are you chicken? 你很胆小吗?Why are you so chicken? 你怎么这么胆小?
no spring chicken 不再年轻;I don't know how old Mike is, but obviously he's no spring chicken. 我不知道Mike 多大,但是很明显他不年轻了;Remember you're no spring chicken any more. 记住你不再年轻了。
Don't count your chickens. 别太乐观,别高兴的太早。