Simplify the following text for a Grade 9 native English-speaking person.
Original: Unsportsmanlike conduct ( or unsporting behavior , or ungentlemanly conduct ) is a term used in many professional sports to refer to a particular player or team who has acted inappropriately and\/or unprofessionally in the context of the game .
Simplified: Unsportsmanlike conduct ( or unsporting behavior , or ungentlemanly conduct ) describes a kind of action by professional athlete . It is when a player or team during the game that is not professional or is offensive .