What is what does sped mean in a bad way?

"Sped" is often used as a slang term for someone who is acting foolishly or in a reckless manner. It can be used as an insult to imply that someone is not thinking clearly or is behaving in a stupid or irresponsible way. Using "sped" in a negative context can be seen as derogatory and offensive. It is important to be respectful and considerate when using language to describe someone's behavior.