It began as a seemingly innocuous, benign mention in an ESPN midseason analysis of the NBA championship race. It has turned into a Miami Heat’s social-media anthem. Dangerous Loomers. No, at the moment there are no plans for a City Edition uniform emblazoned with those two words. At least not yet. But if this ride through the playoffs pushes into June, that could be, well, looming. “We’re on the bandwagon,” Cedric Brown, the Heat’s director of digital media, said with a smile.