# sack out

> English word · Verb

## Definitions
1. To fall asleep, usually from implied exhaustion.

## Etymology
Outgrowth of the earlier idiom, to hit the sack, with possible influences from other senses of to sack (“tackle, pillage”, verb), and to sock (“hit, slam”, verb), providing an implication that sleep has been thrust upon a person.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-09-03.
Canonical page: https://plainspell.com/en/word/sack-out