Definition of do the dirty on in English:

do the dirty on

See synonyms for do the dirty on

phrase

informal British
  • Cheat or betray (someone)

    • ‘she was so angry with him as she thought he'd done the dirty on her’
    betray, cheat, double-cross, defraud, trick, hoodwink, mislead, deceive, swindle, break one's promise to, be disloyal to, be unfaithful to, break faith with, play false, fail, let down
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