misbehaver
/mɪsˈbɛhɪvər/Definitions
1. noun
A person who behaves badly or disobediently, especially a child.
“The misbehaver of the class got into trouble for not following the teacher’s instructions.”
2. verb
To behave badly or disobediently, especially in a childish or uncontrolled manner.
“The child misbehaved at the party, refusing to listen to the adults.”