The duo was named after two real people. While going to college, creator Mike Judge lived next door to a destructive, unsupervised, 12 year-old who called himself "Iron Butt," as he claimed to feel no pain after challenging others to kick him hard in the rear. One of this boy's friends was nicknamed "Butt-head" by Mike Judge and his classmates. There was another boy who lived a few blocks away named Bobby Beavis, though Judge says that he was absolutely nothing like the character aside from his laugh.
On the TV series, Butthead and Beavis respectively wear AC/DC and Metallica shirts. But for legal reasons, the captions are changed in most show memorabilia (including DVD cover art). The altered shirts say "Skull" and "Death Rock," respectively by Butthead and Beavis. However, in one episode, Beavis is seen wearing a Slayer shirt.
During the original broadcast run, each episode would feature cutaways to the duo watching and commenting on various real life music videos. Due to the legal rights surrounding these clips they are usually omitted from most home releases. The commentaries were Judge's real-life thoughts on those videos, and his most biting criticism was for Beavis & Butt-Head to change the channel after looking on in horror.
Foothill High School in Henderson, Nevada was originally going to be called Highland High School prior to its completion. However the name was changed during production to avoid comparisons to the show.
The shows popularity grew enough for AC/DC themselves to notice and asked Mike Judge to create an intro for the band to their 1995-1996 international Ballbreaker world tour. The clip would play just before the band took stage, showing Beavis and Butthead walking around backstage looking for chicks and ending up banging on AC/DCs door because all the chicks where entering that door. Beavis and Butthead would bang on the door saying "Stop hogging all the chicks, give us some" until a devilish looking Angus Young would open the door, give an evil smile and present them the Ballbreaker chick leaving B&B scarred before fading to black and the band would begin.
The show's opening disclaimer claims that Beavis and Butt-Head's antics could cause someone to get "hurt, expelled, arrested, possibly deported." All of the following things have happened to the twosome on the show, though only Beavis was deported (as a result of his Cornholio alter-ego being mistaken for an illegal immigrant).
The music commentary B&B would say was quite often the result of Mike Judges own feelings towards the songs, even going against artists who kids thought where great at the time and deeming them as bad music. This quite often actually had impacts on teenagers that they would then change their minds about certain bands. This was the case with a lot of the rock songs. Mike Judge also mentioned he felt a vibe with teenagers that rap music was starting to sneak in and would become cool among kids so much that he occasionally would depict Beavis as a lover of rap music too.
Tom Anderson bears a resemblance to Hank Hill, another character made by Mike Judge for his other show King of the Hill. As a matter of fact, Judge planned for Tom Anderson to be the father of Hank Hill, but Fox couldn't get the rights to Anderson from MTV.
The show included the titular characters, wearing t-shirts that read AC/DC and Metallica, providing commentary on real-life music videos. The band Winger took offense to the biting comments made by the duo about one of their videos. Upon hearing this, a new character, Stewart, was created to be constantly bullied and ridiculed. Stewart's shirt reads "Winger."
The New Wave of British Heavy Metal band Grim Reaper appeared a few times on the show. Beavis and Butt-head poked fun at them through out the video. However, the band had the last laugh, as in early 2000, fan interest spawned re-issues of the bands first two albums. In the liner notes, the band poked fun at Beavis and Butt-head, including a comment of Where are they now, based on the fact that the cartoon duo had faded from the public memory.