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English definition of “dirty”

dirty

adjective [-er/-est only] (UNFAIR)   /ˈdɜr·t̬i/
unfair or dishonest: That was a dirty tricktelling me you were out of town when you were right here all the time! Dirty is also used to emphasize how strongly you feel that something is wrong or bad: That’s a dirty lie!
(Definition of dirty adjective (UNFAIR) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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