* A misspelling: Perhaps you meant a similar word with a different spelling?
* A made-up word: Some people create their own words for creative or personal reasons.
* A word from a specific language: It's possible that "drochnosanna" exists in a less common language. If you have any context for where you encountered this word, it might help in understanding its meaning.
Please provide more information about the context in which you saw "drochnosanna" so I can help you decipher its meaning.