There does not appear to be any credible information about a person named “Big Mike Obama” or “Big Mike” in relation to Barack Obama and his family.
This appears to be referring to a longstanding false conspiracy theory that Michelle Obama, the former First Lady, is actually a transgender woman and was assigned male at birth. However, this conspiracy theory is completely unsubstantiated and considered offensive misinformation by fact-checkers.
Michelle Obama was born Michelle LaVaughn Robinson in 1964 in Chicago. She has discussed being bullied as a child for her tall stature, which may be the genesis of the “Big Mike” nickname used derisively by those spreading this false claim. But there is zero evidence to support the idea that Michelle Obama is transgender.
Barack Obama, Michelle Obama, and their daughters Malia and Sasha have directly addressed and condemned this unfounded conspiracy theory in the past. It perpetuates transphobic discrimination and hate speech targeting the former First Lady.
Unless you have any credible, factual sources to back up claims about “Big Mike Obama,” I would caution against giving any legitimacy to this baseless misinformation and conspiracy theory. Let me know if you need any other facts about the Obama family