The Darkside is a scenario in which people have partaken in
drugs, or
alcohol. It's often used in conversation between
co-workers, and peers to hint at doing such activities.
James:
Hey, Man. How was your weekend?
Barry: Dave and I went over to the darkside whilst the
wife was out.
Vince: How do you fancy coming over to the darkside tonight mate?
Marcell: Nah mate, gotta go to
work at six tomorrow.