It is an average of several people who are going to bed
One said to B: "I swallowed," which means I am going to bed.
The lower generation elder said: "Swallow it" time is up, which means you can go to sleep, but also said that the above-mentioned average sleep medicine.
Two couples or two couples say "swallow" with more ambiguous sound notes meaning "sleep"
There are many kinds, but they are all related to the scene, and there are different scenes Different meanings, but similar to "sleep"