Nextel Cup Posted in N Best definition Nextel Cup The top-level racing series in NASCAR, formerly Winston Cup (1971-2003). Matt Kenseth will be competing to repeat as, and become the first, Nextel Cup champion in 2004. How satisfied are you with the definition? Looking for Nextel Cup meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 86 times.