From the outrageous John Waters (“Serial Mom,” “Hairspray”), comes another signature exercise in bad taste. Sylvia Stickles, the owner of a convenience store in a working-class Baltimore neighborhood, suffers a concussion. The injury causes a drastic change in her sexual drive, turning her into a sex addict with crazy, wild and urgent desires and compulsions, much to the joy and then frustration of her husband, who has trouble keeping up with her. As Sylvias insatiable libido reaches fever pitch, her new oversexed personality threatens to tear apart the remnants of what wasnt an entirety perfect family to begin with. And thats A Dirty Shame. Starring Golden Globe and Emmy Award-winner Tracey Ullman (TVs “The Tracey Ullman Show,” TVs “Ally McBeal”), Johnny Knoxville (“The Dukes of Hazzard,” “Men in Black II”), Selma Blair (“Legally Blonde,” “Hellboy”), Chris Isaak (“The Silence of the Lambs,” “Twin Peaks: Fire Walk with Me”) and Mink Stole (“Lost Highway,” “But Im a Cheerleader”).