- Types:
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betrayer, blabber, informer, rat, squealer
one who reveals confidential information in return for money
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leaker
a surreptitious informant
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passive source
an informant who is not assigned to obtain specific intelligence but who routinely passes on whatever information he or she has
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whistle blower, whistle-blower, whistleblower
an informant who exposes wrongdoing within an organization in the hope of stopping it
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canary, fink, sneak, sneaker, snitch, snitcher, stool pigeon, stoolie, stoolpigeon
someone acting as an informer or decoy for the police
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copper's nark, nark
an informer or spy working for the police
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grass, supergrass
a police informer who implicates many people