Economist Nouriel Roubini calls CNBC's Cramer a 'buffoon'

CNBC's Jim Cramer has another feud on his hands.

Just weeks after The Daily Show host Jon Stewart took Cramer to task for trying to turn finance reporting into a "game," famous bear economist Nouriel Roubini criticized Cramer on Tuesday for predicting bull markets.

"Cramer is a buffoon," said Roubini, a New York University economics professor often called Dr. Doom. "He was one of those who called six times in a row for this bear market rally to be a bull market rally, and he got it wrong. And after all this mess and Jon Stewart, he should just shut up because he has no shame."

Cramer, the host of CNBC's Mad Money, recently wrote that Roubini is "intoxicated" with his own "prescience and vision" and said Roubini should realize that things are better since the stock market's recent bottom in early March.

Roubini said the latest surge is just another bear market rally following the pattern of other rallies after the government intervened. He expects the market will test the previous low.