Zhège xiàngmù jiāogěi tā jiùshì sālànwū, gēnběn bùnéng xìn.
Handing this project to him is asking for a sloppy mess; he can't be trusted.
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Colloquial and somewhat Wu-dialect-flavored (common in Shanghainese speech). The 烂污 literally means 'rotten filth,' so 撒烂污 paints a vivid picture of someone who 'spreads muck around' rather than doing a job properly.
