volenti non fit injuria

Definition

Legal principle that one who knowingly and voluntarily consents to and takes on a risk (for example, by participating in a potentially dangerous sport, such as motor racing or skiing) cannot ask for compensation for the damage or injury resulting from it. In some jurisdictions (such as UK), however, neither the knowledge nor the willingness of the inherent risk of injury is considered assent, only a written waiver of the right to claim compensation for negligence suffices. Latin for, to a willing person it is not a wrong.