A more thorough explanation:

Definition: Misuser is when someone abuses their power or authority, which could result in them losing that power or authority. It is the opposite of user.

Example: It is an act of misuser for a police officer to use their position to intimidate or extort money from someone.

Explanation: In this example, the police officer is misusing their power and authority by using it for personal gain. This is not what their position is intended for and could result in them losing their job or even facing legal consequences.