Check out this guy who robbed a Dunkin’ Donuts on Merrick Avenue in Jamaica on Sunday night: he flashes a gun at his hip and intimidates the server into handing over cash from the register — while apparently talking on his cell phone. Everyone’s busy these days, but couldn’t it wait till he was done with his robbery? Maybe he was receiving instructions (“Now tell the clerk not to call the police”). The perp is described as black, 30-40 years old, 6’0″, 230-250 pounds. NYPD asks anyone with any info to call 1-800-577 TIPS (8477), visit www.nypdcrimestoppers.com, or text to 274637 (CRIMES), then enter TIP577.