Definition
"Section Eight" refers to a now-discontinued section of the U.S. Army Regulations (specifically, Section VIII of AR 635-200) that allowed for the discharge of soldiers deemed mentally unfit for service. Think of it as a way for the military to recognize when someone's psychological state made them unable to fulfill their duties. While no longer in use, the term has entered popular culture as a slang term. It can refer to someone who is considered crazy, incompetent, or generally unreliable. It is like describing someone as completely out of touch with reality or incapable of rational thought.