Misrepresenting an argument or position, making it easier to dismiss or refute (1).
This is generally done by oversimplifying or exaggerating someone’s position, so that it sounds more implausible. It is a fallacy of diversion.
Person A: "I think we should try to eat less processed food because it's healthier."
Person B: "So you're saying we should only eat organic kale and never enjoy a burger again? That's just unrealistic!"
In this example, Person B commits a straw man fallacy by misrepresenting Person A's point. Person A suggested reducing processed food for health reasons, not eliminating all enjoyable foods or eating only kale.