noun, adverb
toes turned out; duckfooted
Describes a way of walking or standing where the toes point outward. Often used adverbially with 歩く.
彼は外股で歩く癖がある。
He has a habit of walking with his toes turned out.
外股の姿勢は腰に負担がかかることがある。
A duckfooted stance can sometimes strain the lower back.
内股 means walking with toes turned inward (pigeon-toed), the opposite of 外股.
Compound of 外 (そと, 'outside') and 股 (また, 'crotch; thigh'), referring to the outward orientation of the thighs/feet.