piggyback

Adverb

• on the back or shoulder or astraddle on the hip
  • she carried her child piggyback
    

• on a railroad flatcar
  • the trailer rode piggyback across the country
    

Noun

• the act of carrying something piggyback

Verb

• bring into alignment with
  • an amendment to piggyback the current law
    

• support on the back and shoulders
  • He piggybacked her child so she could see the show
    

• haul by railroad car

• haul truck trailers loaded with commodities on railroad cars

• ride on someone's shoulders or back

Related words

• Synonyms: 
  pickaback , pig-a-back