詰んだ。
It's over / I'm doomed (lit. "checkmated").
✦ AI pragmatic read · suggests Casual
A terse, informal exclamation often used among friends or gamers to declare a hopeless or defeated state, conveying a sense of resignation without polite or honorific language.
A starting point, not the final word — open the entry to add your own note if you'd explain it differently.