A nickname given to a male figure who is sweet and caring. Usually used among same sex male couples, baby boi can be assigned to the top to express the bottoms willingness to see his partner as an equal.
My baby boi bought a plane ticket that was $300 to come with me to New York.
A sappy, stupid nickname a moronic girl gives her 2 years younger boyfriend, who happens to be an insane psycho control freak.
Someone slap Deana upside the head and inform her that her "baby boi" is a pussy cheesehead.