madman

A madman is someone who acts strangely or unpredictably because they have lost control over their thoughts and feelings. They might behave erratically and do things that others find strange.

When people use the word "madman" to describe someone, it usually means that person is not thinking clearly and is behaving in a way that's unpredictable. For example, if someone runs around in public yelling at nothing or attacks another person without reason, they might be called a madman. Sometimes the word can also imply that someone has mental health issues like schizophrenia or bipolar disorder, which make it hard for them to control their behavior. However, using "madman" this way can be stigmatizing and is generally not considered polite. The term can also refer to a person who advocates violence or extreme measures as a solution to a problem, making them sound a bit crazy.