Explain "Metagaming" and give an example

metagaming is an out of character action where a players character makes use of knowledge that the player is aware of but that the character is not meant to be aware of

Example: Your a gangster and want to know what the police are doing so you switch to police and change your job title to "Undercover Gangster" and a sad or seat sees it and keeps killing you that is meatagaming it is Metagaming because he knew something a person in Real-Life would no know about.