noun
chafing of the inner thighs; sore crotch/thigh
Refers to skin irritation or soreness caused by friction between the inner thighs, often from walking or running. Can be used as a noun or as a suru-verb (股ずれする) to describe the condition or the act of chafing.
夏に長距離を歩くと、股ずれがひどくなる。
When I walk long distances in summer, my inner thighs get badly chafed.
新しいジーンズで股ずれして痛い。
My new jeans are chafing my inner thighs and it hurts.
Compound of 股 (mata, 'crotch, inner thigh') and 擦れ (zure, 'chafing, rubbing'). The reading ずれ is a rendaku form of すれ.