Monkey brains are the brains of monkeys, which are animals like people but with fur and tails. Just like people have brains to think and feel and do things, monkeys have brains too.
Monkey brains are often talked about in some cultures as something that people eat. This means they take the monkey's brain out of its head and cook it like food. This is not a very nice thing to do because it hurts the monkey and it's not very healthy for people to eat.
Eating monkey brains is also illegal and not allowed in most places around the world. It's important to be kind to animals and not hurt them, and it's also important to eat healthy foods that will help our bodies grow strong and stay healthy. So let's leave the monkey's brains in their heads and find yummy healthy foods to eat instead!