Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
rabble-rouser is a noun meaning "a political leader who seeks support by appealing to popular passions and prejudices". It carries one recorded sense.
a political leader who seeks support by appealing to popular passions and prejudices
Definitions, synonyms and semantic relations for rabble-rouser come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.