koi-koi /ˈkɔɪ.kɔɪ/exclamation 1noun 1 exclamation1 •A call made by a potential winner in a round of koi-koi who wishes to continue the round, risking losing the points they earned so far for a chance to earn more pointsAll right, koi-koi! Here! Boar, deer, butterfly. Boom!! — 2017 noun1 •A Japanese card game for two players played with hanafuda cards, similar to the Korean game of go-stopThe card game involved, called koi-koi, was a kind of Japanese pelmanism and Mitsu had often seen Taguchi-san engrossed in a game with one of his colleagues during the lunch-break. — 1994
