1
to be still half asleep;to be half awake;to be not yet quite awake
うちの弟は、よく寝ぼけて変なことを言い出す。
My little brother gets delirious when he's sleepy. He says the weirdest things.
Other forms
寝惚ける 【ねぼける】 · 寝とぼける 【ねぼける】 (search-only kanji form)