slave card
a government issued I.D. or Drivers license
"Do you have your Slave Card with you?"
card slave
some stupid yet miserable guy who was seduced by bank promotions and finally got sunk into huge credit card debts, usually a post-80s urban salaryman or salarywoman deluded by middle-class dreams.
"...our thrival depends on our capablity and efficiency in developing a card holder into a card slave, or more formally, our life long loyal client..."
credit card slave
A person working to pay off huge debts.
Freya didn't really understand how credit card interest rates work, and ran up large debts during her college days. Now, she is a credit card slave; because most of her salary goes into paying them off.