1. My little brother is even brattier than usual when he's tired.
2. The spoiled child became even brattier after her parents bought her a new toy.
3. I didn't think it was possible, but she somehow managed to be even brattier than before.
4. The brattier kids in the class always seem to get their way with the teacher.
5. The more attention he gets for misbehaving, the brattier he becomes.
6. She becomes brattier whenever she's around her friends who encourage her bad behavior.
7. The brattier children at the party were causing chaos and disrupting the event.
8. I can't believe how much brattier he's become since his parents started spoiling him.
9. The brattier children in the neighborhood are always causing trouble for everyone else.
10. The brattier students in the class tend to disrupt the learning environment for everyone else.