This is a con artists tool. It is a wad of banknote paper wrapped in 5-10 hundred dollar bills to make it seem the con has no need of funds. Thus, the "confidence" in "con man". Name comes from riverboat crime lore.
"When I pulled out my Saint Louie bankroll with my car keys, you should have seen that sucker's eyes pop!"
by panicoasis October 31, 2014