Dallas Grimes is one of the two main antagonists of Beavis and Butt-head Do America, alongside her husband Muddy. She is an arm's dealer who stole a weapon called the X-5 Unit which she put on Beavis' shorts.
She was voiced by Demi Moore.
Beavis and Butt-head Do America
Her role is first mentioned in the movie when Muddy is asking a friend to send men to have her killed and to take the X-5 Unit. She is first seen when Muddy hands a picture to Beavis and Butt-head when he mistakes them for the hitmen. Muddy assigns them to "do" (murder) his hot wife and offers an amazing award for it.
When Beavis and Butt-head find her in Las Vegas, Dallas is about to shoot them when she meets them in her hotel room, although she realizes they are practically harmless and really stupid. She asked them how much Muddy was paying them to kill her, Butt-Head said, "10 uh." Dallas took that as an insult, "10 Grand. Oh that Cheap-Ass." She at first asks them to go and "do" Muddy for twice the money, although it is then when she realizes that they think to "do" is to have sex. When Beavis takes his pants off and fights Butt-head on who gets to "do" her, she takes the pants and sews the X-5 Unit into it.
Later on, she's given a cavity search by ATF Agent Hurly and confesses that the unit is really is in the pants of one of the boys. In Washington D.C., Muddy decides he should just kill her himself when the duo go missing, until she seduces him when she says that "They'll both kill them." When they are arrested, Muddy thinks that they are back together, but Dallas betrays him believing that she'll be let free if she helps the ATF put Muddy away for life, only to suffer the same fate and they are both placed under arrest. She is last seen in the secured truck when Tom Anderson is mistaken for the real suspect and thrown into the truck under arrest.