talk radio 
noun [mass noun]
A type of radio broadcast in which the presenter talks about topical issues and encourages listeners to phone in to give their opinions: pundits claim that talk radio has totally altered the political climate...
- Reynolds is fast becoming the table setter for what gets talked about on talk radio and TV chat shows.
- The story will definitely continue to be the lightning rod of talk shows and talk radio.
- On talk radio, current affairs issues serve the same purpose as everything else that goes to air.