expression, noun
untucked obi; dangling obi
Refers to an obi (kimono sash) worn with the end hanging down loosely, often associated with a casual or stylish look. The phrase is a fixed expression.
彼女はだらりの帯を締めて、浴衣姿で現れた。
She appeared in a yukata with her obi tied loosely, the end dangling down.