Definition of "ratfink"
ratfink
noun
plural ratfinks
An informer or spy; a traitor.
Quotations
The first factor is labeled the "Ratfink" factor. This factor consists only of items that measure whether a boy would give information to various adult figures if one of his friends were in trouble.
1968 October, LaMar T. Empey, Steven G. Lubeck, “Conformity and Deviance in the 'Situation of Company'”, in American Sociological Review, volume 33, number 5, Albany, N.Y.: American Sociological Society, page 763
In my novella, "Our Lady of Desperation," a painter and civil servant square up to one another. […] One of the protagonists was an artist; so it was assumed I was somehow in his camp. In fact both are ratfinks; when thieves fall out, honest men, if they don't come into their dues, are at least afforded a wry smile.
1997, Keith Roberts, chapter III, in Lemady: Episodes of a Writer's Life (Borgo Bioviews; no. 9), San Bernardino, Calif.: Borgo Press; republished Berkeley Heights, N.J.: Wildside Press, 1999, page 35
He wasn't a gabber, nor a squawker not a ratfink nor a snitch. He wasn't a whistleblower. He wasn't a gossip. He didn't talk about someone behind their back. Banks knew that firsthand because he had tried on several occasions to get Quinley to talk about other people, and Quinley would never do it. He'd laugh and change the subject.
2007, Ichabauk Rum, “Handra Delamore”, in Ill: A Novel: Book One, Lincoln, Neb.: iUniverse, page 63
(also attributive) A dislikable or contemptible person.
Quotations
Maxwell—or Maxie, as he was familiarly called by his once and former rat fink girlfriend—lived in a six-story walkup on a narrow street in Calm's Point, […]
1999, Ed McBain [pseudonym; Evan Hunter], chapter 6, in The Last Dance: A Novel of the 87th Precinct (87th Precinct Mystery; 50), New York, N.Y.: Simon & Schuster, page 150
I started not to write the sad story of what happened to these two outstanding soldiers because I didn't want to convey the mistaken impression that the ratfinks they ran into were typical of the fine soldiers who fought in Vietnam.
2006, Ted G. Arthurs, chapter 10, in Land with No Sun: A Year in Vietnam with the 173rd Airborne (Stackpole Military History Series), Mechanicsburg, Pa.: Stackpole Books, pages 222–223
'What did you just do?' Sunshine asked. 'Did you just kill a moth?' / 'No,' he said. He glanced at it then flicked it off. Shimmering dust filmed his skin. […] / 'Sometimes you are such a ratfink jackass,' she told him, throwing his hand down, some of the shimmery dust on her own fingers.
2012, Lucy Wood, Diving Belles and Other Stories, 1st Mariner Books edition, Boston, Mass.: Mariner Books, page 99
verb
third-person singular simple present ratfinks, present participle ratfinking, simple past and past participle ratfinked
(transitive) To inform on; to betray.
Quotations
It led to some rather incredible and colourful claims in the submission by the union that the employers had ratfinked on previous agreements.
1980 November 21, Anthony George Malcolm, “Agricultural Workers Amendment Bill: Report of Labour and Education Committee”, in Parliamentary Debates (Hansard): Second Session, Thirty-ninth Parliament: House of Representatives, volume 435, Wellington, N.Z.: P. D. Hasselberg, government printer, published 1981, page 5237
There's a breed of people in every office who breed problems around them—ratfinking about your long lunch breaks, revealing confidential salary information, blaming everyone for every error.
1999, Karen Salmansohn, The 30-day Plan to Whip Your Career into Submission: Transform Yourself from Job Slave into the Master of Your Destiny in just One Month, 1st trade paperback edition, New York, N.Y.: Broadway Books
On Feb. 11, McLeod officials marched into the FCC [Federal Communications Commission] to relate this story, just as Netscape rat-finked on Microsoft to the Department of Justice. FCC officials demanded that Qwest tell them what the heck was going on.
2000 May 1, David [Stephenson] Rohde, “Qwest's Behind-the-scenes Merger Maneuver”, in John Dix, editor, Network World, volume 17, number 18, Southborough, Mass.: Network World, page 40
Take a three-inch notepad (similar to a Post-It note), and print a large, brightly colored letter on it. […] "T" stands for "Tattle Tale." Punishment for rat-finking on the other child.
2010, Jill Milligan, Michael Milligan, “Creative Moms: Putting the 'D-I-S' in 'D-I-S-C-I-P-L-I-N-E'”, in Mom Rules: Notes on Motherhood, the World's Best Job, New York, N.Y.: Skyhorse Publishing, page 59