fink
[noun]
Synonyms: informer, betrayer, canary, nark, snitch, squealer, stoolie, stool pigeon, talebearer, tipster

[TahlilGaran] English Synonym Dictionary ▲

Fink, Mike
(?1770–1823) a US man who was famous for taking boats up and down the Mississippi River, for being good at shooting, and for talking proudly about his adventures

[TahlilGaran] Dictionary of Contemporary English ▲

I. fink¹ /fɪŋk/ noun [countable] American English informal old-fashioned
[Date: 1800-1900; Origin: Perhaps from German, 'finch, student not belonging to a student association']

1. someone who tells the police, a teacher, or a parent when someone else breaks a rule or a law

2. a person who you do not like or respect

[TahlilGaran] Dictionary of Contemporary English ▲

II. fink² verb [intransitive +on] American English informal old-fashioned
to tell the police, a teacher, or a parent that someone has broken a rule or a law Synonym : squeal on somebody

[TahlilGaran] Dictionary of Contemporary English ▲