Piggyback

Etymology
A corruption of pickaback, itself a corruption of pick-pack, like a pack.

Adjective



 * 1) On somebody's back or shoulders.
 * a piggyback ride

Adverb

 * 1) On somebody's back or shoulders.
 * to ride piggyback

Verb

 * 1)  To attach or append something to another (usually larger) object or event.
 * They tried to piggyback that proposal on the rivers and harbors bill.
 * The popular host can’t claim credit for the trade, though. The idea wasn’t his. He piggybacked off another successful investor who had a history of picking winners. 
 * 1)  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.
 * 2)  Utilizing last mile wiring (not wireless slang) rented from a larger owner ISP by a smaller ISP, last milers are obligated to sell to competitors in places like Canada.