Related topics: Crime, Police
su·per·grass /ˈsuːpəɡrɑːs $ -pərɡræs/ noun [countableC] British EnglishBrE informalSCCSCP a criminal who gives the police information about many other criminals, in order to get a less severe punishment 〔为获得从轻处罚而〕向警方告密的罪犯,告发同伙的罪犯