Used by the American "right wing", the term is used to accuse Democrats of attacking wealthy people. This is often rhetorically disguised so people may interpret it as an attack on the "middle class".
Bill O'Reilly: But that's class warfare!
Barack Obama: Um... what does that even mean?
Bill O'Reilly: ummm.... WELL DO IT LIVE!
John McCain: Black Saddam Hussein Osama wantz to fuel class warfare by razin yer taxes!
Someone who's informed: Um... no he doesn't...
John McCain: Um... WELL DO IT LIVE!
Teabagger: COMMIE! SOCIALIST! That's CLASS WARFARE! Who cares about those worthless lazy welfare queens starving to death when gazillionaires all over America are struggling to afford their yachts, Hummers, private islands, and toilet paper made out of 100 dollar bills?
Despite assumptions to the contrary, class warfare is not a war between classes. it is, instead, the fuedal practise of attacking someone of equal rank first, and leaving others to take on people of thier own rank.
*A user said this should be deleted: "Some fucker speaking out of his rich fucking arse. He wouldn't know class warfare when it is burning down his fucking house."*
Wow, props to the genius there who can magically determine wealth from a historically accurate definition. Maybe you should not confuse yourself with inter-class warfare eh, Fuckwit.