drift off
中級 (B1) informal
To slowly fall asleep, or to stop paying attention and let your mind wander.
"She drifted off during the film and woke up just before the credits rolled."
文脈の中で聞く
What happens if you drop 0.125 grams of antimatter?
Veritasium · 46:09
the antihydrogen atoms would form, drift off,
The Cozy Ones on Monica’s Couch | Friends
Friends · 35:54
Now, you wait for her to drift off,
The TROJAN Test
minutephysics · 2:44
it will slowly but eventually drift off and stop