adjective
dirty or untidy in appearance
adverb
in a dirty or untidy manner
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The grubby appearance of the suspect's clothing indicated he had been involved in illegal activities.
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I don't want to eat at that grubby diner, the tables look dirty.
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Her ex-boyfriend's new girlfriend is always posting grubby pictures on social media.
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The politician's grubby dealings were exposed by the investigative journalists.