1 B1 idiomatic informal
To go to sleep, especially quickly or after being tired.
"After the long road trip, the kids sacked out as soon as we got home."
inseparable
sack out
B1 informal inseparable intransitive
Informal American expression meaning to go to sleep or take a nap.
In plain English
To go to bed or fall asleep, often quickly or comfortably.
What does "sack out" mean?
2 meanings, ordered from most common to least. Color-coded by CEFR level.
2 B1 idiomatic informal
To nap or rest informally, often on a couch or non-bed surface.
"He sacked out on the living room floor while watching football."
inseparable
Literal vs figurative
Words literally mean
To get into a sack — 'sack' is slang for bed.
Actually means
To go to bed or fall asleep, often quickly or comfortably.
Usage tip
Chiefly American English. 'Sack' as slang for bed dates back at least to early 20th-century American military usage.
Words that pair with "sack out"
Natural word combinations native speakers use most often.
couch early late immediately finally
How to conjugate "sack out"
The five tense forms you'll use most often.
Base
sack out
I/you/we/they
3rd person
sacks out
he/she/it
Past simple
sacked out
yesterday
Past participle
sacked out
have + pp
-ing form
sacking out
continuous
Hear "sack out" in the wild
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