tombstoning
n.— «Devon coastguards have condemned a dangerous new summer craze of “tombstoning,” which involves jumping off cliffs into the sea from higher and higher points, and which, they say, has been inspired by Pepsi Max advertisements.» —“News In Brief—Cliff Craze Condemned” Guardian (U.K.) Aug. 3, 1995. (source: Double-Tongued Dictionary)
Further reading
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