* It's a misspelling: There might be a similar word you're thinking of, like "waste" or "oh, waste".
* It's a foreign word: "Ohanwaste" could be a word from another language. If you can provide the language of origin, I might be able to help translate it.
* It's a made-up word: It's possible the word is a creative invention, perhaps in a specific context like a book or a game.
Please provide more context or information about where you encountered this word, and I'll do my best to help!