fink
noun [ C ] US old-fashioned informal uk/fɪŋk/ us/fɪŋk/
告密者，打小报告者；讨厌鬼；卑鄙小人
someone who tells secret and damaging information about someone else, or an unpleasant person
Kelly's such a fink - she told Mom I was smoking again. 凯莉真爱打小报告——她告诉妈妈我又在吸烟了。
Synonym: sneak (PERSON)
Compare: stool pigeon