Piggyback meaning : A ride on somebody's back or shoulders. An act or instance of piggybacking. To attach or append something to another (usually larger) object or event. To obtain a wireless internet connection by bringing one's own computer within the range of another's wireless connection without that subscriber's permission or knowledge. To utilize "last-mile" wiring rented from a larger owner ISP by a smaller ISP. To carry someone on the back or shoulders. To transport (a lorry/truck) on a flatbed railway waggon To enter a secured area at the same time along with someone having authorized access; to tailgate On somebody's back or shoulders. Pertaining to transportation of goods where one transportation unit is carried on the back of something else. For example, a truck on a train. On somebody's back or shoulders.