piggyback
    adv 1: on a railroad flatcar; "the trailer rode piggyback across
           the country" [syn: piggyback, pickaback,
           pig-a-back]
    2: on the back or shoulder or astraddle on the hip; "she carried
       her child piggyback" [syn: piggyback, pickaback,
       pig-a-back]
    n 1: the act of carrying something piggyback
    v 1: ride on someone's shoulders or back
    2: haul truck trailers loaded with commodities on railroad cars
    3: haul by railroad car
    4: support on the back and shoulders; "He piggybacked her child
       so she could see the show"
    5: bring into alignment with; "an amendment to piggyback the
       current law"