The deliberate non-suicidal injuring of one's own body.

A place or course of danger.

(intransitive) To harm oneself deliberately.

Although technically a breach of some code or law may have occurred, there was no actual damage meriting punishment, apology or retribution.

(ethics, medicine) To perform no actions which will be injurious or in any way unfavorable to another person, regardless of whether one does anything of positive benefit for that other person.

Used to express that someone's action had no serious adverse consequences.

(public health) A range of public health policies designed to lessen the negative social or physical consequences associated with various human behaviors, both legal and illegal.

Misspelling of no harm, no foul.

(law) legal principle under which the state should only limit an individual's actions to the extent that they would cause harm to another

plural of number needed to harm