sacked out

Related to sacked out: come in handy, worse for wear, so much for, take account of

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.

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.

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