Dallas Grimes is the main antagonist of Beavis and Butt-Head Do America. She and her husband Muddy Grimes run a 'mom-and-pop' arms smuggling ring, leading to her eventual possession of the bio-weapon X-5 Unit. She convinces Beavis and Butt-Head to carry the unit to the US Capitol in exchange for sex, though she is truly just seeking to retrieve the weapon for profit and eliminate the duo.
She is voiced by Demi Moore.
