the lion's skin

n.

1. The hunter kept the lion's skin and head as trophies.
这猎人保存狮子的皮和头作为纪念品。

来自《现代英汉综合大词典》

2. That candidate is an ass in a lion's skin, he would never have the courage to stand up for any cause.
那个候选人是一个说大话的懦夫,他决不会有胆量为任何事业挺身而出。

来自《简明英汉词典》