A carhop is a waiter or waitress who brings fast food to people in their cars at drive-in restaurants. Carhops usually work on foot but sometimes use roller skates, as depicted in movies such as American Graffiti and television shows such as Happy Days. Carhops have long been associated with hot rods.

What does carhop mean slang?

a person who serves customers in their cars. at a drive-in restaurant.

Why is it called a carhop?

The name "carhop" came from the practice of the waitress or waiter jumping up on the running board of a patron rolling into the parking lot. This car hopping showed that this particular car was that servers car, as tips were the main income of these waiters and waitresses.