tombstone
noun
[ ˈtuːmstəʊn ]
• a large, flat inscribed stone standing or laid over a grave.
• "his grin exposed his yellowed teeth like a row of tombstones"
• an advertisement listing the underwriters or firms associated with a new issue of shares, bonds, warrants, etc.
tombstone
verb
• jump into the sea from a cliff or other high point.
• "thrill-seeking lads tombstoned off the rocks"