* Tough or violent: This is the most common meaning. It refers to someone who is physically strong, aggressive, and not afraid to use violence. For example, "He's a mean dude, don't mess with him."
* Excellent or impressive: This is a less common usage, but it can be used to describe something that is of high quality or particularly good. For example, "That car is mean," or "She's got a mean right hook."
* Angry or upset: This is a less common usage, but it can be used to describe someone who is angry or upset. For example, "He was mean as hell when I told him what happened."
It's important to remember that slang terms can vary in meaning and usage depending on the region and the specific group of people using them.
It's also worth noting that "mean" can be a disrespectful term, and should be used with caution. It's important to be aware of the potential negative connotations associated with this word, and to use it appropriately.