冷笑话 [lěng xiào huà] n. Cold joke. Similar to brain teasers, cold jokes are funny because they urge the listeners to think outside the box. Homophones, Chinese words with multiple meanings, and linguistic deviations like personification are often included in cold jokes.
A toothpick is walking on the street when a hedgehog passed by. The toothpick waved his hand and yelled, “…Bus…” The hedgehog replied coldly, “I’m overloaded…”