supergrass
/ (ˈsuːpəˌɡrɑːs) /
noun
an informer whose information implicates a large number of people in terrorist activities or other major crimes
Nearby words
superglue, supergovernment, supergrade, supergranulation cell, supergraphics, supergrass, supergravity, supergroup, superharden, superheat, superheavy
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Examples from the Web for supergrass
The new names were handed over by a suspect turned "supergrass".
All this is small beer compared with the supergrass that BCL Burton Copeland may turn out to be.