To make someone stop doing theater. The act of sabatoging their desire to perform on stage. Especially when that person is attractive, but you yourself aren't attracted to his/her theater abilities.
Jennifer Lopez and Amanda Bynes are going to untheater Cameron Diaz because she loses her attractiveness when she's on stage, and she needs to talk about other things besides acting.
by gYpSy TaNgErInE December 17, 2010
Get the Untheatermug.