Piggybacking may refer to: Piggy-back (transportation), something that's riding on the back of something elsePiggybacking (security), when an authorized person allows (intentionally or unintentionally) others to pass through a secure doorSplash cymbal piggybacking, mounting a cymbal on top of an already stand-mounted cymbalPiggybacking, a practice in which a person with bad credit uses the seasoned trade line of credit of someone elsePiggyback plant, Tolmiea menziesiiPiggy-back (law), sharehold… (More on Piggyback)