The radio frequency by which Fire, EMS and local police are dispatched and operate on. Most often run by the county to cover Fire, EMS and police dispatch on a county wide system. Named the Whacker Radio because a Whacker will listen to these broadcasts on his\her scanner or two way radio, often at a volume where everyone around them can hear every word.
(Inside a medical transport ambulance)
EMT1: What the hell is that noise?
EMT2: That's the county radio.
EMT1: The Whacker Radio? Why the hell do we need that on?
EMT2: Because I'm listening to it.
EMT1: (sigh) You're one of those damn Whackers aren't you?
EMT2: Damn right, I take that as a compliment!