When someone talks back, they answer in a rude way.
Talking back is usually not good because it can make people upset.
Examples:
She always talkbacks when I ask her to do something.
He doesn't like it when I talkbacks to him.
I don't want to talkbacks to my parents.
The cat talkbacks when I tell it to get off the table.
Talking back to the teacher is never a good idea.
The dog talkbacks when I tell it to sit.