What does "I'm blown" mean?

I'm blown means I am amazed, impressed, surprised, or overwhelmed, often positive reaction to something impressive, similar to saying I'm blown away meaning very impressed, or can mean tired or exhausted depending on context. For example, I'm blown by your performance means I am very impressed and amazed by performance, I'm blown meaning mind blown by incredible experience. In some contexts, I'm blown can mean I'm exhausted or out of breath, like after running, I'm blown meaning I'm out of breath and tired, similar to needing HEPA filtration after dust exposure. In British slang, I'm blown can mean I'm tired or drunk depending on region. In drug slang, I'm blown can mean intoxicated. Generally, I'm blown is short for I'm blown away, meaning amazed or overwhelmed. It can also mean shocked or stunned by news, like I'm blown by that news meaning I am shocked. So I'm blown meaning varies, but most common is amazed or impressed, indicating strong emotional reaction of awe or surprise, with alternative meaning of exhausted or out of breath after physical exertion, so context determines whether amazed or tired.