It is likely a misspelling or a word from another language.
Here are some possibilities:
* "Mahadeep" could be a misspelling of "Maharajah" or "Mahatma" These are both titles with specific meanings in Indian culture.
* "Mahadeep" might be a transliteration of a word from a language like Hindi or Sanskrit. Could you provide more context about where you encountered this word?
* It could be a regional term or slang. Do you have any information about the origin or usage of the word?
Please provide more information so I can give you a more accurate answer!