Based on the lyrics, "Cuz U Bald (demo)" by Khary appears to be a diss track aimed at someone who is bald. The song seems to be centered around the idea that the person's forehead is particularly large and unattractive, and that this is why they struggle to attract romantic partners.
The repeated line "Cause you bald nigga cause you bald" suggests that the baldness is being used as a sort of insult or put-down, as if the lack of hair is somehow indicative of the person's overall negative qualities. The line "Nigga you will never get no head" takes the insult even further, implying that the baldness is so unattractive that the person will never receive oral sex.
Overall, the song seems to be a fairly straightforward and juvenile insult aimed at an individual who is bald and is perceived as unattractive because of it. It could be seen as an example of the kind of machismo and posturing that is often associated with hip-hop culture.