Injun bank roll
n.— «The dollars he pulled out of his pocket never seemed to diminish what he called his “Injun bank roll,” with its few big bills on the top bolstered by many smaller ones beneath.» —“Injun Joe Thompson” by Kevin Kinsella Languor Management Apr. 26, 2006. (source: Double-Tongued Dictionary)
Known in Boston as a “Chicago bankroll”
cf http://www.dictionaryofgambling.com/gambling_terms/poker/c/
Also known as a Michigan roll, a Missouri roll, and a knot.