<p><strong>Noun</strong></p><ul><li>a strikebreaker</li><li>a labor spy</li><li>an informer; stool pigeon</li><li>a contemptible or thoroughly unattractive person</li></ul><p><strong>Verb (used without object)</strong></p><ul><li>to inform to the police; squeal</li><li>to act as a strikebreaker; scab</li></ul><p><strong>Verb Phrase</strong></p><ul><li>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.</li><li>to become untrustworthy.</li></ul>