Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
chin-up is a noun meaning "an arm exercise performed by pulling yourself up on a horizontal bar until your chin is level with the bar". It carries one recorded sense.
an arm exercise performed by pulling yourself up on a horizontal bar until your chin is level with the bar
Definitions, synonyms and semantic relations for chin-up come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.