(Child of the 70's here...) While in conversation with a millenial yesterday, I used the word "fink" to describe a low, sneaky, two-faced um, fink. She'd never heard the word. "Ratfink"? Nope. "The Wizard of Id...'The king is a fink'?" Nope.
Now, I know what happened to "gyp", (which was as commonplace as yo-yo's and bubble gum, in my day) but, why abandon a perfectly innocent word like "fink"?
I tried the N-gram thing - didn't get far. I found a blurb on this site by FumbleFingers (hoping you can lend a hand here, FF)
I recently relocated, so this may just be a regional anomaly... But, I am curious... Has "fink" disappeared from the AmE lexicon?