Noun
butthead (plural buttheads)
(sometimes vulgar, colloquial, derogatory) An annoying person or someone who is difficult to get along with.
If you were on the phone with me and Tommy right now, we would probably forget you were there, we'd just be cracking jokes. It's like Beavis and Butthead. Nikki Sixx
And it wasn’t "Butthead," it was "Buddha." Source: Internet
“It seemed like the time was right to get stupid again,” came the quote from Judge attached to the Beavis and Butthead press release, a stirring declaration of intent. Source: Internet
I believe it means, “Don’t be a lying, classless butthead.” Source: Internet
Finish the England page and wonder what butthead put Neil Webb and Trevor Steven in the team ahead of Gazza and Waddle. Source: Internet