noun
inner thigh; inside of the thigh
Refers to the inner part of the thigh, often used in contexts of chafing, exercise, or body description.
ランニングで内股が擦れて痛い。
My inner thighs are chafing and sore from running.
noun
pigeon-toed; toes turned inward
Describes a way of standing or walking with the toes pointing inward; often used in everyday contexts, not just medical.
彼女は内股で歩く癖がある。
She has a habit of walking pigeon-toed.
noun
uchi-mata (judo throw)
A judo technique where the attacker puts their leg between the opponent's legs to throw them. Domain-specific martial arts term.
彼は内股で一本を取った。
He scored an ippon with an uchi-mata.
外股 means 'outer thigh' or 'duck-footed' (toes turned outward), the opposite of 内股 in both body part and walking style senses.
Compound of 内 (uchi, 'inside') and 股 (mata, 'crotch/thigh'). The reading うちまた is a straightforward kun'yomi combination.