This is a person who is your friend. This also means that this person is a close friend. This phrase can also mean that you know someone but you do not know there name. This also replaces the word "hello".
A phrase with the tonal flexibility of saying everything from "Hell yeah, bro" to "You are one smart motherfucker" (Just like Denzel Washington often says in the film American Gangster). It can be used in almost any situation that involves one's friends or enemies.
"What the fuck do you mean you locked the keys in the car?"
"Don't worry, I have a spare pair in my pocket."
"My man!"
"There's no way you can prove I stole that woman's purse."
"We recorded a video of you doing it."
"My man."
1. roadmen will say 'i swear das my man' if they see an opp. usually said when an opp is seen on the top bus deck and the roadmen are running outside. if your alone at night and guys start saying 'i swear das my man' your due to get smoked