Noun
five-o (uncountable)
(US, slang, street slang) The police.
There's nothing - there's nothing - as action-packed as 'Hawaii Five-O.' Michelle Borth
I don't think anyone connected with Five-O believed the show would last as long as it did. James MacArthur
Before settling on the name "Hawaii Five-O", Freeman considered titling the show "The Man". Source: Internet
Five-O lacks its own radio network, necessitating frequent requests by McGarrett to the Honolulu Police Department dispatchers. Source: Internet
Lost Five-O Energy + Juice has been on the market for a little while, but after 30 hours of flying and sitting in airports coming back to east coast USA from New Zealand, I needed some serious jet lag medication. Source: Internet
Show you’re a true Hawaii Five-O fan with the Hawaii Five-O Book ‘em Danno mousepad. Source: Internet