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秒で byoude
Blink and it's done.
What does byoude mean?
Literally in seconds. Falling asleep, selling out, regretting a purchase — none of it takes long.
Example
布団入ったら秒で寝た。
I fell asleep the second I got into bed.
Vibe
Who you can say this to, and how it lands.
Friends only Casual. Natural with friends, out of place at work or with strangers.
The story behind byoude
Japanese has plenty of ways to say quickly, but byoude is the one that sounds like a stopwatch. Literally in seconds, it treats duration as a measurable brag, and the actual number of seconds is never the point. Nobody has counted; everybody agrees it was fast.
It spread through casual speech and social media in the 2010s and now attaches to almost anything that collapses instantly: falling asleep, selling out, giving up, regretting a purchase, forgetting a name you had just been told. The unspoken tone is admiring or resigned rather than neutral. Speed is presented as slightly out of your hands, which conveniently removes any question of blame.
Get byoude in your pocket
秒で is one of 308 words in YABAI, a Japanese culture snack for Android. Every word comes with its meaning, an example sentence, a vibe check and a story like the one above — in 13 languages, read aloud by your device. Paid app: no ads, no sign-up, no subscription.
