The police. The term comes from the TV show Hawaii Five-0, about police officers in Hawaii, the fiftieth (50th) state. The five-oh are closing in on us—how are we going to avoid being arrested?
5-O
verb
See five-oh
five-oh
and 5-O
n. the police. (From a television program, Hawaii Five-O.) If you hit me again, I’ll call the five-oh!