white-knuckle
adjective [ before noun ] informal uk/ˌwaɪtˈnʌk.əl/ us/ˌwaɪtˈnʌk.əl/
惊险刺激的;令人捏把汗的
A white-knuckle experience or activity makes you feel very frightened and often excited.
a white-knuckle ride in a theme park 主题公园里一次惊险刺激的骑乘