Meaning of SACK OUT

Pronunciation:			sak awt
WordNet Dictionary
	Definition:		[v]  go to bed in order to sleep; "I usually turn in at midnight"; "He turns out at the crack of dawn"
	Synonyms:		crawl in, get into bed, go to bed, go to sleep, hit the hay, hit the sack, kip down, retire, turn in
	Antonyms:		arise, get up, rise, turn out, uprise
	See Also:		bed down, bunk down