expression
it's over; finished; game over
Internet slang derived from 終わった (owatta, 'it ended'). Used to express that a situation is hopeless, a failure, or beyond recovery, often with a humorous or dramatic tone.
See also: 終わる (おわる)
テスト全然できなかった。オワタ。
I totally bombed the test. It's over.
電車に乗り遅れた。オワタ。
I missed the train. I'm done for.