The polar opposite of (and often directly caused by) draco in leather pants, whereby fandom demonizes a previously likeable, good character, often for the sake of shipping.
The origin of the name comes from Harry Potter fandom, in which fanfic writers shipping Hermione with characters other than her canon love interest, Ronald Weasley (or Ron), would often include some terribly contrived arc in which Ron goes insane from Hermione dumping him, and promptly joins the villains of the series, the Death Eaters, thus making it easier for readers to sympathise with Hermione'schoice and hence the ship of choice.
Perfect, non-HP example of Ron the death eater in action:
In 2002, the second series of the Pokemon anime saw a cast change, in which one of the three main characters, Misty (who was heavily shipped with one of the other main characters, specifically Ash), was swapped for a younger model, May. Cue dozens of gratuitous rapefics written in May's dishonour. Voila: May the death eater.
The ass eater is a commonly used term for the serial rectum licker of houston texas back in 1988 who's named Isaiah Flaschke. He was a night predator who ate EVERYONES ass. No one was safe if you were within 28 miles of him. He won 3 Presidential awards for bravery during his time in iraq where he licked roughly 458 bootyholes on the field risking his life each and every time to incapacitate enemy soldiers. he genuinely couldn't stop so after his discharge in 1994 he travels the usa eating ass, escaping police custody and even kept a collection of bootyflakes as a momento of his ass eating habit.
Lil Wayne, you are a rapper eater.
antonyms - David Bowie, Miley Cyrus, George W. Bush, Judge Judy, Xela Kebert.
synonyms - Weezy, Weezy F, Weezy F Baby, Weezy Wee, Young Money, Young Weezy, Lil Weezy, Tha Hot Spitta, The Best Rapper Alive, The Rapper Eater,