Mike Judge made this revelation in a recent interview with Hollywood Reporter, telling the publication that he was inspired to use hidden messages in Beavis and Butt-Head because of the cultural fears surrounding them at the time. Although Judge does not quote it directly in his interview, he seems to be referring to the so-called satanic panic of the 80s and early 90s. Among accusations of mass ritual murders and daycares run by Satanists, the idea that youth-oriented music has subliminal messages that can be heard when played backwards was part of the fear (according to New York Times).
This is what Judge grabbed onto when he conjured a gag in which Beavis talking backwards. Judge: “Actually, back in the 90s, there was still a lingering story from the late 80s about how metal albums were accused of telling the opposite story. And I did have a couple of instances where Beavis started talking backwards… However, to further poke fun at this point, Judge clarified that when you actually listen to Beavis say it backwards, the message is far from what those who is involved in the satanic panic: “he says, ‘Stay in school and go to college.’ .'”
If you’re a fan of Judge, you know that this vicious fire indicates the ingenuity and biting wit that has permeated much of his work since then. And it will likely show again when Beavis & Butt-Head returns their talents to Paramount+. This significant event will take place on August 4, 2022.