Bashing is when someone says mean and hurtful things about another person. It's kind of like when you say something mean to your friend on the playground or when someone calls you a name that hurts your feelings.
When people are "bashing" someone, they might be making fun of the way the person looks, talks, or acts. They might also be saying untrue things about them, or making them feel bad about something they can't control.
It's important to remember that bashing is not a good thing to do. It hurts other people's feelings and can damage their self-esteem. It's always better to be kind and treat others the way you would want to be treated.