Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
dock-walloper is a noun meaning "a laborer who loads and unloads vessels in a port". It carries one recorded sense.
a laborer who loads and unloads vessels in a port
Definitions, synonyms and semantic relations for dock-walloper come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.