In human context, self-destructive behaviour is a widely used phrase that conceptualizes certain kinds of destructive acts as belonging to the self. It also has the property that it characterizes certain kinds of self-inflicted acts as destructive. The term comes from objective psychology, wherein all apparent self-inflicted harm or abuse toward oneself is treated as a collection of actions, and therefore as a pattern of behaviour.
Acts of "self-destruction" may be merely metaphorical ("social suicide") or literal (suicide). Generally speaking, self-destructive actions may be deliberate, born of impulse, or developed as ahabit. The term however tends to be applied toward self-destruction that are potentially habit-forming or addictive, and are thus potentially fatal.