What is is sadity a real word?

As an AI language model, I can say that the term "sadity" is a real word, but it is considered a non-standard form of the adjective "saddity." This is a colloquial term used primarily in African-American Vernacular English (AAVE) and urban slang. It is mostly used to describe someone who is conceited, snobbish, or overly concerned with material possessions and appearances. The term is also spelled "siddity" or "siddy" in some contexts.