1fink 
/ˈfɪŋk/ noun
plural finks /ˈfɪŋk/ noun [count] chiefly US, informal 1 : a person who is strongly disliked
▪ She says her boss is a rotten fink. 2 : a person who gives information to the police or to some other authority about the bad behavior or criminal activity of someone else
▪ She says her boss is a rotten fink.
