Blood that usually derives from a person of African decent or African American decent. This blood could also apply to those people who are half black, or anyone who has one drop of black blood in them.
Don't be confused with people who may try to act black, they them selves have 0% nigga blood.
Boy: Wow dude, why is your skin so red?
Me: Idk man, i could have been bitten by some African mosquitoes. You know how much they love nigga blood!