refers to police / law enforcement. From the TV show "Hawaii 5-0" about the 50th State's Police Department.
by CCC_Trinity June 9, 2005
 Get the five omug.
Get the five omug. ACTUALLY....five o comes from the 80's US patrol cars mustang 5.0 litre engine. It called to alert to an oncoming cop car.
by gchild July 30, 2005
 Get the five omug.
Get the five omug. One of the divisions in new york is the 50th division so when people wanted to say cops are around they would call them Five O's
by Soldier B March 2, 2005
 Get the five omug.
Get the five omug. by Alex March 4, 2004
 Get the Five Omug.
Get the Five Omug. n. Short for police officers.  Originated from the TV show Hawaii 5-0 which was a copp show in the 1970's.  Hawaii is the 50th state, hence the nickname "5-0".
by thug4life September 29, 2002
 Get the five-omug.
Get the five-omug. by GuidoPosse69 February 8, 2005
 Get the five-omug.
Get the five-omug. The word or expression is yelled when a negro spots a policeman/vehicle which sends neighbouring negros scattering
by Sudyer March 5, 2006
 Get the Five-o! Five-o!mug.
Get the Five-o! Five-o!mug.