eating alone; solitary meal
Slang term for eating alone, often with a nuance of loneliness or social awkwardness. Commonly used among young people.
I'm used to eating alone during lunch break.
Apparently some people eat in the bathroom to hide that they're eating alone.
Derived from ぼっち (from ひとりぼっち, 'all alone') and 飯 (めし, 'meal'). The exact origin is uncertain, but it likely emerged in internet slang and youth culture.