That means overdraft credit. You know, when money is withdrawn from your bank account and the available balance goes below zero?
Sure comes in handy. Take this lady here. Please. She glanced at her banking app during breakfast one morning and was rather surprised to discover that the grocery store chain Rewe had just booked 8,590,000,000.42 euros from her account – with a friendly “Rewe says thanks!”
After some quick calculations she realized that a mistake had been made. Accidents will happen, folks.
Bank zieht Frau vermeintlich acht Milliarden Euro ab.

Now I understand why “Geiz ist geil.”