Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
ball-breaker is a noun meaning "a demanding woman who destroys men's confidence". It carries 2 recorded senses.
a demanding woman who destroys men's confidence
a job or situation that is demanding and arduous and punishing
“Vietnam was a ball-breaker”
Definitions, synonyms and semantic relations for ball-breaker come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.