孩子气 (hái zi qì) — Literally 'childish
Literally 'childish,' this term refers to someone who behaves in a naïve or immature manner, often used in a teasing or affectionate way. It can be endearing or frustrating depending on context.
Example Usage
他虽然已经成年人了，但偶尔还是会表现得很孩子气。
Although he is an adult, he still occasionally acts very childish.
Cultural Context
Commonly used in light-hearted banter among friends or couples.
Category: love-friends