单词supergrass
n.: （为求得宽大处理）向警方告密的罪犯
网络: 超级幼苗；超级草；超级幼苗合唱团
（为求得宽大处理）向警方告密的罪犯:
a criminal who informs the police about the activities of a large number of other criminals, usually in order to get a less severe punishment
复数：supergrasses
n.informergrassinformantsquealerrat