Definition: The phrase "sack out" is an informal way to say "go to sleep" or "fall asleep." It means to prepare for sleep, usually after a long day.
In more advanced contexts, you might encounter "sack out" in storytelling or casual writing to convey a sense of exhaustion. It often implies that the person is so tired that they might fall asleep almost immediately.
Hit the hay: This is another casual way to say “go to bed.”
Turn in: This means to go to bed as well.
"Sack out" is a relaxed, informal way to talk about going to sleep. It’s perfect for casual conversations and conveys a sense of tiredness.