na-adjective, noun
neglect of health; unhealthy lifestyle
Refers to a pattern of not taking care of one's health, often through poor diet, lack of sleep, or overwork. Used as a noun or adjectival noun.
不養生がたたって、体を壊してしまった。
My neglect of health caught up with me, and I ruined my health.
彼の不養生な生活習慣は心配だ。
His unhealthy lifestyle habits are worrying.