pop
n.— «Mike Rehmus, editor of Model Engine Builder, a magazine published five times a year in Vallejo, Calif., said that the builders of miniature internal-combustion engines seemed to have in common a “satisfaction of making something mechanical run that started out as a pile of raw metal.” “The first time it runs is pretty exciting—we call it the first pop,” he said. “This is pretty good therapy for a lot of people.”» —“Saying ’Small Block’ and Really Meaning It” by Jim Norman New York Times June 24, 2007. (source: Double-Tongued Dictionary)