also: ウオーターシュート
noun
water chute; shoot the chute
Refers to the amusement park water ride where a boat or raft slides down a steep flume into a splash pool. The term is a direct loan from English, commonly used in Japanese theme parks.
夏になると、遊園地のウォーターシュートは大人気だ。
In summer, the water chute at the amusement park is very popular.
ウォーターシュートに乗ったら、ずぶ濡れ
I got soaked when I rode the water chute.