fink

noun

1. a strikebreaker.
2. a labor spy.
3. an informer; stool pigeon.
4. a contemptible or thoroughly unattractive person.

verb (used without object)

5. to inform to the police; squeal.
6. to act as a strikebreaker; scab.

Verb Phrases

7. fink out,
   1. to withdraw from or refuse to support a project, activity, scheme, etc.; renege: He said he’d lend me his motorcycle, but he finked out.
   2. to become untrustworthy.

noun

1. a strikebreaker; blackleg
2. an informer, such as one working for the police; spy
3. an unpleasant, disappointing, or contemptible person

verb

4. (intr often foll by on) to inform (on someone), as to the police