The unfavourable purple mouth you get from drinking too much red wine.
"I could tell Corene got into the red wine last night because she had mad pirate mouth."
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A derogatory phrase that implies the subject has an unclean oral orifice and uses said unclean orifice to perform oral acts with persons who may commit or have committed illegal acts or violence at sea.
"You shut your dirty pirate whore mouth! Yea, I said it."
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