Sentence:  He wasn't a gabber, nor a squawker not a <WSD>ratfink</WSD> 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 subjec. 
Meaning of the word marked with <WSD> tags:  An informer or spy; a traitor. (from 1960s)