Proper Noun Examples for Supergrass

For those like me who never heard the term "supergrass" before, and are even more confused after Googling and finding out the entire first page of results are about an English rock band of that name:> Supergrass is a British slang term for an informant who turns Queen's evidence, often in return for protection and immunity from prosecution.

Supergrass definitions

noun

a police informer who implicates many people

See also: grass