expression, i-adjective
toss and turn in sleep; restless sleeper
Describes a person who moves around a lot while sleeping, often kicking off blankets or ending up in a different position. The opposite is 寝相がいい.
See also: 寝相がいい
弟は寝相が悪くて、朝になると布団が床に落ちている。
My younger brother is a restless sleeper, and by morning his futon has fallen onto the floor.
寝相が悪い人は、寝ている間に何度も寝返りを打つ。
People who toss and turn in their sleep roll over many times during the night.