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The North American Supporters' Trophy, known by its acronym NAST or as The Nasty is an annual award given to the North American Soccer League team with the best regular season, as determined by the NASL points system on aggregate between the Spring and Fall championship seasons in year. Akin to the Supporters' Shield in Major League Soccer, the minor premiership of Australasian sports (called a "premiership" by the A-League), and the President's Trophy of the NHL, the NAST will be awarded each year annually in order to recognize overall consistent performance through the calendar year. The NAST will be presented retrospectively to the prior year winners.
Originally, it was to be known as the Woosnam Cup deriving its name from Phil Woosnam, the long time Commissioner of the original North American Soccer League who died during the summer of 2013.