"Poisoned" baby names are names that were long popular, and then, for whatever reason, sharply dropped in popularity in one year.
"Fad" names are eliminated by filtering out names that were in the bottom 20th percentile ten years before the drop off in popularity occurred.
Can you guess the six most "poisoned" baby names in the USA?
https://medium.com/@williecostello/is-hilary-still-the-most-poisoned-baby-name-in-u-s-history-133b4a421304#:~:text=Our%20results%20have%20changed!,86.6%25%20between%202014%20and%202016.