The spelling of "more bigdeal" is not correct. In phonetic transcription, "more" is pronounced as /mɔːr/ and "bigdeal" as /bɪɡdiːl/. Therefore, if we want to convey the meaning of "more important" or "more significant", the correct spelling would be "more big deal". The word "big" stands alone, while "deal" is attached to it, forming a compound noun. It is important to pay attention to correct spelling and pronunciation to avoid confusion and miscommunication.