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Phrase(s): Lucky at cards, unlucky in love.
Prov. If you frequently win at card games, you will not have happy love affairs. (Can imply the converse, that if you do not win at card games, you will have happy love affairs.) • Fred: I wish I was George. He always wins tons of money at our poker games. Alan: Don’t be jealous of him. Lucky at cards, unlucky in love.
McGrawhill's American Idioms And Phrasal Verbs