キャットニップMeanings1nouncatnip; catmintRefers to the plant Nepeta cataria, known for its effect on cats. The Japanese term イヌハッカ (犬薄荷) is also used, but キャットニップ is common in pet-related contexts.See also: イヌハッカ (いぬはっか)猫ねこのおもちゃにキャットニップを入いれると喜よろこぶ。Cats love it when you put catnip in their toys.