Hit - The Sack

: While the term existed earlier, it surged in popularity during World War II. Soldiers frequently used "sack" as slang for their sleeping bags.

: Some sources trace the slang use of "sack" for a bunk or bed back to naval contexts as early as 1825. Usage and Examples Hit the Sack

The phrase has roots in both historical bedding practices and military slang: : While the term existed earlier, it surged

"Hit the sack" is a popular informal idiom that means . It is often used when someone is feeling particularly exhausted after a long day. Origin and History : While the term existed earlier