5-0 (pronounced five-oh) became a popular nickname after the television show Hawaii Five-O which aired from 1968 to 1980. Five-o referred to the Hawaiian police force in the show, based on Hawaii being the fiftieth state to join the union.
5-0 (pronounced five-oh) became a popular nickname after the television show Hawaii Five-O which aired from 1968 to 1980. Five-o referred to the Hawaiian police force in the show, based on Hawaii being the fiftieth state to join the union.