knock kneed

/ˈnɑk ˌnid/
adjective
  1. Having knees that touch each other when standing straight, with the ankles apart.
    • Some knock-kneed adults experience knee pain from the misalignment.
    • The physical therapist gave exercises to help the knock-kneed patient improve their posture.
    • The knock-kneed toddler waddled as he learned to walk.