2) A guy who sells you drugs.
3) Someone who is truly awesome. Can be used for males or females.
2) I'm going off to the alleyway to get some "stuff" from the man.
3) Wow! You're the man! / Wow! He's the man! / Wow! She's the man! / Wow! That's the man!
Me: "Hmmm I bet your dad was an unemployed drug addict also."
Beggar: "Hey you some sorta psychic?"