loose jointed

/lus ˈdʒɔɪntɪd/
adjective
  1. Having joints that are unusually flexible or that move easily; often used to describe a person who moves in a relaxed, fluid way.
    • He walked with a loose-jointed stride, like someone who had never known a stiff muscle.
    • My cat is so loose-jointed that she can twist around and lick her own back.
    • The loose-jointed dancer seemed to flow across the stage without effort.
Antonyms
What does "loose jointed" mean? | whatsthatwordmean | whatsthatwordmean