i-adjective
uneasy conscience; guilty feeling
Describes a lingering sense of guilt or moral discomfort, often after doing something wrong. Frequently used in the phrase 寝覚めが悪い (literally 'waking up feeling bad'), but the の form is also common as a prenominal modifier.
See also: 寝覚めが悪い
彼は寝覚めの悪い思いを抱えていた。
He was troubled by an uneasy conscience.
そんなことをして寝覚めの悪い気分になった。
I felt guilty after doing such a thing.