You don’t have to be in Las Vegas tonight to gamble away some cash during the GOP presidential debate.

The Obama campaign has concocted an online  debate watch game  that charges supporters’ credit cards an incremental, predetermined amount each time the candidates say a selected phrase, like “Obamacare,” “9-9-9,” “socialism” and “fence.”

Matthew Barzun, Obama for America national finance committee chairman, says the novelty literally puts “money where their mouth is.”

“As the Republican candidates prattle on about defunding Social Security, ending Medicare as we know it, and everything else they support, they will literally be building this campaign,” Barzun wrote in an email blast to supporters.

“Don’t worry,” he said, “you can set a cap on how much you want to give, in case someone (not saying who) says “9-9-9? two dozen times,” a clear reference to GOP businessman Herman Cain.

So how much would you be on the line if you pulled the lever with $5 dollars down on “9-9-9? in the last GOP debate?

You’d be on the line for $55, according to an analysis of the debate’s transcript.  Cain’s economic plan was mentioned 11 times at the Darmouth debate, including 7 times by Cain himself.