Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
double-jointed is an adjective meaning "having unusually flexible joints especially of the limbs or fingers". It carries one recorded sense.
having unusually flexible joints especially of the limbs or fingers
Definitions, synonyms and semantic relations for double-jointed come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.