From Longman Dictionary of Contemporary Englishbe rolling in money/dough/cash/itbe rolling in money/dough/cash/itto have or earn a lot of money ‘He’s rolling in it, ’ said the girl, pointing at Lewis. → roll
Examples from the Corpus
be rolling in money/dough/cash/it• Mel Levine is rolling in dough.• After all, this man was a tycoon as well as a doctor; he must be rolling in money.• Because the people who are rolling in it certainly are. 