别等不该等的狗
[bié dĕng bù gāi dĕng de gŏu]
Translates into 'Do not wait for a dog unworthily'. This quirky phrasing advises against lingering hopelessly over someone (sometimes used figuratively to imply someone undependable), using a dog analogy humorously or satirically. Be cautious though, because using animals analogies about people can sometimes appear impolite depending on context.