Dictionary / Vocabulary / 冷や冷や
ひやひや · also ヒヤヒヤ
to feel chilly; to be afraid; to be frightened; to be nervous
その銃どうしたの?本物?危ないから下ろしなさい。冷や冷やするから。
What are you doing with that gun? Is that real? Put it down, that's dangerous. You're freaking me out a little.