flash roll noun a large number of small-denomination banknotes with a large-denomination note showing, giving the impression of a great deal of money US
Neil unfolded and fanned out the rest of the bundle. It was mostly fives and tens, maybe adding up to another hundred, two hundred bucks at most. “You take the five, all I’ve got left is a flash roll.” — Robert Campbell, AliceinLa-LaLand, p. 21, 1987