Synonyms for Rat fink:

• n.

  •snake in the grass (noun)
  • skunk,
  • Pandora's Box,
  • creep,
  • backstabber,
  • trap,
  • villain,
  • snake,
  • pitfall,
  • viper,
  • snake in grass.
  •stool pigeon (noun)
  • fink,
  • tattletale,
  • agent provocateur,
  • rat,
  • spy,
  • snitcher,
  • plant,
  • turncoat,
  • tattler,
  • decoy,
  • source,
  • sneak,
  • informant,
  • betrayer,
  • stoolie,
  • weasel,
  • snitch,
  • double-crosser,
  • blabbermouth.

• Other synonyms:

  •n.
  • canaries,
  • canary,
  • informer,
  • narc,
  • nark,
  • shill,
  • snake in the grass,
  • squealer,
  • stool pigeon,
  • tipster,
  • whistle-blower,
  • whistleblower,
  • shills,
  • narks,
  • narcs,
  • deep throat,
  • tipsters,
  • police informer,
  • stool-pigeon.
  •Other relevant words:
  • scuzzball.

Antonyms for Rat fink:

• n.

  • Other antonyms:
    hero, heroine, lady, idol, saint, gentleman, angel, role model.