noun
luck with the opposite sex
Used in contexts like fortune-telling or casual talk about romantic prospects. Often compared with 結婚運 (marriage luck).
See also: 結婚運
今年の異性運はあまり良くないらしい。
Apparently my luck with the opposite sex isn't very good this year.
彼女は異性運に恵まれている。
She is blessed with luck in romance.
Compound of 異性 (opposite sex) and 運 (luck). A straightforward modern coinage.