A fun way to say "man" usually when talking lightheartedly with your buds (mangs). in certain social situations "mang" can be quite addictive to use but it seems impossible to overuse it. Also made famous in the muddy waters song "mannish boy".
Andy: hey mang!
Stefan: oh hi mang!
Andy: ju got any butter mang?
Stefan: nah mang.
Muddy Waters: I'm a MAAAANG! I'm a full grown Mang. I'm a Hoochie coochie Mang! (and so forth. great song)