It's a great word for a deplorable tactic. I found this word in an article, "The One-Star Blitz on Megyn Kelly's Book and the Weaponization of Amazon Blurbs."
Silly me, I thought this article would be about how wishy-washy liberal Commie pinkos were giving one-star reviews to Ms. Kelly's "Settle for More."
But in fact it's about how right-wing trolls and know-nothings are giving one-star reviews to it, with such comments as, "Wow get over yourself. Your not that good! … Your treatment of Newt and Trump was inexcusable.”
The Slate article defines "freeping" as "a sleight-of-hand that depends on brute force. It
originated on the right, which makes sense given its most prominent uses
so far: howling about diversity in science fiction, mutinying against
lady Ghostbusters, rallying around Trump."