credit-card banging
n.— «But in those early years, with credit-card numbers circulating among unscrupulous Web masters and affiliates, various frauds proliferated. Prime among them was “credit-card banging,” whereby a person subscribing to one site might find he has been charged for a slew of others.» —“A Disciplined Business” by Jon Mooallem New York Times Apr. 29, 2007. (source: Double-Tongued Dictionary)