一匹狂奔的草泥马
[yī pĭ kuáng bēn de căo ní mă]
The literal translation is 'A wildly galloping swamp horse'. This is internet slang. In Chinese culture, there are certain terms or slangs derived from homophones or puns; this term originated from a humorous phonetic transformation of骂人的话 (cursing) into a whimsical image, indicating someone acting wildly, crazily, or out of control in a humorous context. It's often used in online contexts to express frustration in a light-hearted manner.