Maybe it is too obvious to comment on, but this is probably about a typical, young, inexperienced mc that doesn't grasp things that are truely important(for Slug it's his son, "dangerous surrounding" and his years of experience) so he just tries to fit the image of a hip-hop artist by doing coke and it's fucking him up and Slug is just notifying him of it.
Maybe it is too obvious to comment on, but this is probably about a typical, young, inexperienced mc that doesn't grasp things that are truely important(for Slug it's his son, "dangerous surrounding" and his years of experience) so he just tries to fit the image of a hip-hop artist by doing coke and it's fucking him up and Slug is just notifying him of it.