When someone says, "See you later, alligator," a common and playful response is:
"In a while, crocodile!"
This playful exchange is a lighthearted way of saying goodbye to each other. It's a fun and friendly way to part ways, often used among friends or acquaintances. Keep in mind that it's not a formal or professional way to say goodbye, so use it in appropriate social settings with people who are familiar with this playful expression.