What is a rush card fee?

Excuse me, could you kindly explain what a rush card fee entails? I've heard of it in relation to certain financial transactions or services, but I'm not entirely clear on its precise meaning and purpose. Is it a type of surcharge or additional cost that applies when a cardholder requests expedited service or delivery? Or is it something else entirely? Could you please elaborate and provide some context to help me better understand this concept?