sack out

sack out

To go to bed or to fall asleep. I'd been getting up so early all week long that I was ready to sack out by 11 on Friday night. Jonathan sacked out in the passenger seat, so I had to drive nearly the whole way in total silence.
See also: out, sack
Farlex Dictionary of Idioms.

sack out

to go to bed or go to sleep. It's time for me to sack out. Let's sack out early tonight.
See also: out, sack

sacked out

asleep. Mary is sacked out in her room. Here it is ten o'clock, and you are still sacked out!
See also: out, sack
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.

sack out

Go to sleep, go to bed, as in We sacked out about midnight. This slangy idiom is a verbal use of the noun sack, slang for "bed" since about 1940; it alludes to a sleeping bag and appears in such similar phrases as in the sack, in bed, and sack time, bedtime.
See also: out, sack
The American Heritage® Dictionary of Idioms by Christine Ammer.

sack out

v. Slang
To sleep or go to sleep: After a long day at work, I sacked out on the couch.
See also: out, sack
The American Heritage® Dictionary of Phrasal Verbs.

sack out

in. to go to bed or go to sleep. (see also sacked out.) It’s time for me to sack out.
See also: out, sack

sacked out

mod. asleep. Here it is ten o’clock, and you are still sacked out!
See also: out, sack
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • in bed
  • the sandman's coming
  • read (oneself) to sleep
  • read oneself to sleep
  • be in the Land of Nod
  • in the Land of Nod
  • cork off
  • corked
  • corking
  • catch flies