Completely worn out.
Common Chinese internet and youth slang. The structure '...like a dog' is used for many adjectives in Chinese (e.g., single like a dog).
A direct translation of 'lèi chéng gǒu' (累成狗). While English has the idiom 'dog-tired', the Chinese structure 'tired like [something]' is often preserved in Chinglish. It vividly describes being as exhausted as a panting dog after a long run.
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