Bernie SandersBernard (Bernie) SandersTrump: ‘Clapper has now admitted there was spying on my campaign’ Overnight Defense: Trump decision on Korea summit coming 'next week' | China disinvited from major naval exercise | Senate sends VA reform bill to Trump Senate sends major VA reform bill to Trump's desk MORE briefly paused his rally in Indiana Monday morning to compliment a supporter who used an expletive to sum up the Democratic presidential candidate's message for the “billionaire class.”

"I think that when the top one-tenth of 1 percent now owns almost as much wealth as the bottom 90 percent, we got some other choices that we can make,” Sanders told supporters in Evansville.

“That choice is to tell the billionaire class,” he continued, when a man in the audience interrupted with a shout of “to f--- off.”

The interjection prompted laughter from Sanders, who said approvingly, “Well, that is one way to phrase it.”

"I myself am constrained,” he joked. "I can’t quite phrase it like that, but that’s not bad.”

The Vermont senator said the four-letter word conveyed his point “very succinctly,” noting that he liked it but couldn’t repeat it.

"But it’s something with eff off,” Sanders quickly added.