If you think Brad Pitt and Angelina Jolie are so cute they’d be watchable in anything, this stupid action comedy-romance may be just the acid test youand theydeserve. Over $110 million was lavished on Simon Kinberg’s script about an unhappily married couple of secret assassins, working for rival organizations that assign them to bump each other off. Expect 120 minutes of unfunny, self-ingratiated shtick, punctuated by explosions, cynical mass slaughter, and a few fancy effects. Director Doug Liman also made Go (1999), but then he had characters and a plot. With Vince Vaughn. PG-13. (JR)