Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
shake-up is a noun meaning "the imposition of a new organization; organizing differently (often involving extensive and drastic changes)". It carries one recorded sense.
the imposition of a new organization; organizing differently (often involving extensive and drastic changes)
“a committee was appointed to oversee the reorganization of the curriculum”
“top officials were forced out in the cabinet shakeup”
Definitions, synonyms and semantic relations for shake-up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.