脑子进水 (nǎo zi jìn shuǐ) — Water in the brain
Literally meaning 'water in the brain,' this slang is used to describe someone acting foolishly or irrationally, as if they are confused. It's often used in a light-hearted, joking context.
Example Usage
他怎么会说出那种话，真的是脑子进水了。
How could he say something like that? He must really have water in his brain.
Cultural Context
Commonly used among friends to tease each other when acting silly.
Category: savage-humor