https://www.moneysavingexpert.com/credit-cards/stooze-cash-credit-cards/
Stoozing refers to the scheme of leveraging 0% APR promotional offers and cheap balance transfers on credit cards to earn money by saving those funds in another investment vehicle with higher guaranteed returns.
Stoozing might have originated from a user named Stooz on the Motley Fools forum in the early days.