没事 (méi shì): It's nothing (Verb) — Meaning & Stroke Order

He stole someone else's things and pretended nothing happened, which is utterly shameless.

She always pretends to be fine, but deep down she's very sad.

Although he said he was fine, he never truly felt at ease in his heart.

My friend always says staying up late is fine, but I have never approved of this view of his.