如蛆附骨

rúqūfùgǔ ㄖㄨˊ ㄑㄩ ㄈㄨˋ ㄍㄨˇ

    • lit. like maggots feeding on a corpse (idiom)
    • fig. fixed on sth
    • to cling on without letting go
    • to pester obstinately

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Sources