supergrass
🇺🇸
/ˈsuːpərɡræs/
🇬🇧
/ˈsuːpəɡrɑːs/
A person who commits crimes but tells the police about other criminals to get a lighter punishment.
The police arrested the gang after a supergrass revealed their plans.
경찰은 스파이가 그들의 계획을 드러낸 후 갱단을 체포했습니다.