Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
pickaback is an adverb meaning "on a railroad flatcar". It carries 2 recorded senses.
on the back or shoulder or astraddle on the hip
“she carried her child piggyback”
Definitions, synonyms and semantic relations for pickaback come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.