Impulsivity refers to a person's tendency to act on their thoughts and feelings without thinking through the consequences or taking time to consider alternative actions. It is often characterized by quick, unplanned reactions that may not be in line with long-term goals or rational decision making. Impulsive behavior can manifest in various ways such as excessive risk-taking, spontaneous purchases, or impetuous decisions without considering the potential consequences. People who are highly impulsive may struggle to control their emotions and urges, leading them to act on whims rather than carefully weighing their options.