“Girl dinner” is no longer the hottest trend — “boy dinner” is, thanks to Harry Styles. A counterpart to the viral gals’ concept, the boy dinner has been floating around for some time, but it finally had a breakthrough when the “As It Was” singer recently shared his own version of it. And now a fast-food chain is turning it into a meal deal. “Boy dinner, I’ve discovered, is just eating a rotisserie chicken over the sink,” Styles, 32, shared on Brittany Broski’s popular “Royal Court” YouTube