i Register
In some senses, fink is marked as slang, US. Watch for register when choosing this word.
noun
A contemptible person.
Near-synonyms: see Thesaurus:jerk, Thesaurus:idiot
An informer.
A strikebreaker.
verb
To betray a trust; to inform on.
“I move that we determine through a thorough investigation whether the new worker is a fink or no; and if he is a fink, let us discover who heʼs finking for!”
verb
Pronunciation spelling of think.