Definition of "submarining" [submarining]

• Present participle of submarine. (verb)
• Tending to strike unexpectedly, in the fashion of one who submarines (adjective)

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• "This is a strangulation hazard, known as "submarining," that was responsible for at least 10 infant deaths between 1995 and 2008, the latest dates for which data are available, according to the Consumer Product Safety Commission."
• "The ASTM industry safety standard, which took effect in January 2008, protects against the hazard, known as submarining, by requiring a larger opening that avoids trapping or strangling an infant, the agency said."
• "Huber had noticed that snowboarders are able to float on powder, rather than "submarining" beneath the surface like inexperienced skiers on conventional skis."