piggyback - definition and synonyms

verb [intransitive/transitive] informal 

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present tense
present participlepiggybacking
past tensepiggybacked
past participlepiggybacked
  1. if one thing piggybacks on another, it uses it, is based on it, or takes advantage of it
    piggyback (sth) on sth:

    A nonsecured network could lead to a lot more than a neighbour piggybacking on your Wi-Fi for free.

    piggyback (sth) off sth:

    This test is being piggybacked off another national survey.