It is safe to say that Ms. Streep gives the worst performance of her career — safe to say because it is so clearly what she intends, and she is not an actress capable of failure. There is a degree of fascination in watching an Oscar-winning Yale School of Drama graduate mug and squirm, shimmy and shriek and generally fill every moment with antic, purposeless energy, as if she were hogging the spotlight in an eighth-grade musical.