(idiomatic) to do without being seen (by); to do behind (someone's) back; to do without the knowledge of (e.g. one's parents)

(Buddhism) Mahayana

A satirical term referring to the modern phenomenon in which Buddhist practice is largely neglected in Japan and is only sought out for funeral services.

capacity, competence

(euphemistic) actual sex acts / (euphemistic) unsimulated sex

propaganda of the deed

(law) a juristic act.

using force

(criminology, law) criminal act, criminal offense