Supergrass are an alternative rock band from Oxford, England who were at their peak in the Britpop era of the mid-1990s. The band consists of brothers Gaz Coombes (guitar and lead vocals) and Rob Coombes (keyboards), Danny Goffey (drums and vocals), and Mick Quinn (bass and vocals).

Supergrass is the third album by the band of the same name. It is often referred to as "the X-ray" album due to the picture on the sleeve. The Australian release came with a bonus live EP.

Heavy Duty informant who has decided to turn QE (Queens Evidence) and testify against former colleagues

a police informer who implicates many people

the ultimate grass, ie. someone who has turned 'state's evidence', an informant. Usually a criminal who cuts a deal to avoid prosecution or have their sentence reduced.