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sack drill

Sack drill is US military slang for sleep — with 'sack' being military slang for bed or bunk, and 'drill' used ironically to describe the 'practice' of lying in it.

ˈsæk ˈdɹɪl135 viewsLast reviewed Jun 29, 2026+ Add a definition
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#1·Apr 28, 2026

Sack drill is US military slang for sleep — with 'sack' being military slang for bed or bunk, and 'drill' used ironically to describe the 'practice' of lying in it. The term is humorous and self-aware, poking fun at military culture's tendency to frame everything as training or practice. It is used informally among soldiers and veterans and captures the gallows-humour register common in military speech. Also seen as 'hitting the sack drill' or simply 'drilling on the sack'.

After a forty-mile ruck march, the only drill anyone wanted was sack drill.
Origin: Compound of 'sack' (military slang for bed/bunk, from the older general slang sense of 'sack' as a rough sleeping bag or mattress) + 'drill' (military training exercise), used ironically to elevate sleep to the status of formal training. Editorial expansion authored on Slangora.
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#2·Apr 27, 2026

(US, military slang, idiomatic) Sleep.

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