'90s Halloween Costumes: Beavis and Butt-Head From "Beavis and Butt-Head" What to wear for Butt-Head: Red shorts, a black AC/DC t-shirt, and a slicked-back rockabilly hairstyle. Bonus points for fake braces. What to wear for Beavis: Gray shorts and a blue Metallica shirt; tease your blond hair up. How to act: Just get the laugh down, and you're golden. Heh, heh, heh. Image Source: Everett Collection