A 51-year-old Everett man who mastered the hardboiled lingo of a Hollywood hit man — but got tripped up during the execution — is cooling his heels in a federal lock-up this morning after getting caught in a bizarre murder plot at the center of an FBI sting, authorities say.Joseph Burke was ready to drive to New York next Saturday, dress up as a black man, track down his target and shoot him “right in the (expletive) derby,” according to an FBI affidavit.