An Encylopedia Britannica Company

supergrass

1 ENTRIES FOUND:
supergrass /ˈsuːpɚˌgræs/ Brit /ˈsuːpəˌgrɑːs/ noun
plural supergrasses
supergrass
/ˈsuːpɚˌgræs/ Brit /ˈsuːpəˌgrɑːs/
noun
plural supergrasses
Britannica Dictionary definition of SUPERGRASS
[count] British, informal
: a criminal who gives information to the police about a large number of other criminals