Extremely reckless.
Likely to commit, or to attempt to commit, suicide.
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.
Someone suicidal; someone likely to kill themselves.
Extreme; unreasonable.
Of a person: lacking reverence for God; of an action: not in accordance with God's will or religious teachings.
Immoral, sinful, or wicked.