Okay kiddo, so you know how people come in different ages, right? There are babies, toddlers, big kids, grown-ups, and even really old people! Well, zillennials are a special group of people who were born at a certain time between the late 1990s and early 2000s. They are sometimes called "cuspers" because they're right on the edge between two groups of people - the millennials and the Gen Zers.
Zillennials grew up in a world that was changing really fast. They might remember flip phones, but also grew up using smartphones and the internet. They saw the world before and after things like the 9/11 attacks, and were influenced by things like social media and online communities.
Basically, zillennials are a unique group of people who have experienced different things in their lives compared to other age groups. They might have a mix of old-school and new-school ways of doing things, and might have different perspectives on the world around them. But at the end of the day, they're just regular folks like everyone else!