Okay kiddo, so fast food is like getting your food really quickly from a restaurant. But some people don't like it because they think it's not very healthy.
You know how fruits and vegetables are good for our bodies? Well, fast food doesn't really have a lot of those things. Instead, it has things like burgers, fries, and sugary drinks, which are not so good for us if we eat them all the time.
Plus, some people say that fast food companies don't treat their employees very well and they don't always pay them enough money. And when we eat too much fast food, it can cause us to be overweight or get sick.
So, while fast food is yummy and convenient, some people think we should try to eat healthier foods instead.