fink /fɪŋk/noun 4verb 1forms 3phrases 1 noun4 •(US, slang) A contemptible person. •(US, slang) An informer. •(US, slang) A strikebreaker. •(South-Africa) Any of several birds in the family Ploceidae native to southern Africa. verb1 •(US, slang) 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!” — 1952 formsfinked · finking · finks Phrases with fink fink outTo avoid or shirk, either by failing to perform, or by performing in a grossly insufficient, negligent, or superficial manner.