二极管 (èr jí guǎn) — Originally means "Diode
originally means "Diode", and because "二极" means "bi-pole", it's now used as a metaphor to mock people with extreme, black-and-white thinking. In their eyes, things are only completely right or completely wrong, they never consider any middle ground.
Example Usage
别理他，他就是个二极管，完全不讲理。
Bié lǐ tā, tā jiù shì gè èr jí guǎn, wán quán bù jiǎng lǐ.
Category: internet-culture