Someone that gives off vibes that they have no self esteem or self confidence and usually were abused and neglected during their childhood. Then as adults they have a difficult time in their day to day life. Their spirit is usually broken and subservient. Someone that is emotionally troubled can easily be taken advantage of by unscrupulous individuals.
I think Jane is emotionally troubled, she reminds me of a puppy that has been kicked too many times and is lost in a crowd of people.
A whack job nutcase who goes on a murderous rampage for any number of reasons, including but not limited to mental instability, political/ideological disputes, delusional government conspiracy theories, or personal socio-economic woes.
As defined by Pima County, AZ Sheriff Clarence Dupnik on msnbc.
That fuckin' whack-job Jared Loughner who shot AZ Congresswoman Gabby Giffords and 18 others is a prime example of a particularly troubled personality.
Mentally disturbed as a result of reckless behavior (Drug use,Alcohol, Excessive Partying)
Or by Depression, Anxiety/Break from reality due to traumatic experiences.
Or, one of the aforementioned causing the other.