Something that harms a person or thing.
A substance that is harmful or lethal to a living organism when ingested.
Any substance that inhibits catalytic activity.
An intoxicating drink; a liquor. (note: this sense is chiefly encountered in the phrases "name your poison" and "what's your poison ?")
To place false information into (a cache) as part of an exploit.
To cause (someone) to hate or to have unfair negative opinions.
To use poison to kill or paralyse (somebody).
To pollute; to cause to become poisonous.
To cause to become much worse.
To inhibit the catalytic activity of.
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.