This is how you address a man friend, that
may be a bit more obese than the average fat kid. The root of the term comes from brodie (which is used to call your friend "
bro", but without sounding stupid old skool), but adding "Mc" as to denote a
love for fast food.
This term is only used if you are uber
tight with your friend, as it can also be used in a derogatory fashion against dingle berry/wannabe friends that are large in mass, stupid, and won't leave you alone.