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バックレる bakkureru
Vanished without a word.
What does bakkureru mean?
Not just quitting — going silent mid-shift and never coming back. It also covers playing dumb about something you obviously did.
Example
バイト初日でバックレたらしい。
Apparently he ghosted his part-time job on day one.
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 bakkureru
The usual account traces バックレる back to しらばっくれる, the verb for playing innocent when everyone knows perfectly well, with the front of the word worn away over time. That would explain the two senses it still carries: pretending not to know, and disappearing entirely.
It spent years in the vocabulary of school troublemakers before part-time work culture made it a genuinely serious accusation. A shift abandoned mid-rush leaves real people covering, and the noun バックレ turns up in warnings to new hires. Between friends it stays light, a plan quietly ditched. Attached to a job, it is one of the harsher things you can say about someone.