tombstoning
noun /ˈtuːmstəʊnɪŋ/
  /ˈtuːmstəʊnɪŋ/
[uncountable] (informal)- the activity of jumping into the sea from a high point, such as a cliff墓碑:从高处(例如悬崖)跳入大海的活动 - The summer craze of tombstoning has led to a string of injuries and deaths.夏季的墓碑热潮导致了一连串的伤亡。 
 
- The summer craze of tombstoning has led to a string of injuries and deaths.