Someone (or something) doomed; a hopeless case, especially someone who is bound to die soon.
A ball hit out of the playing area for a home run.
Someone suicidal; someone likely to kill themselves.
Likely to commit, or to attempt to commit, suicide.
Extremely reckless.
Highly likely to certain to result in the deaths of the participants; dangerous or reckless to such a degree as to be tantamount to suicide for those taking part.
Pertaining to suicide.