The event in which you are unwillingly and unexpectedly lulled to sleep without intentionally wanting to take a nap. Happens most often in scenarios in which a person is simply going to "just lay down for a couple minutes" to relax.
Napaporn: hey are you ok
Guy 1: no I had a bad day my girlfriend broke up with me
Napaporn: sorry to hear that, can I get you anything?
Guy 1: nah Iām good but thanks for asking
Napaporn: no problem