A bi-rascal is a bi-racial child, usually with a white mother, who has unkempt hair and/or an overall unkept appearance because their primary caretaker is not experienced with caring for curly ethnic hair. Also refers to bi-racial children who are disrespectful or unmannered due to not receiving proper instruction in how black people need to navigate the world.
My brother's wife Karen came over for Thanksgiving along with their two bi-rascals, neither of them look like their hair has ever seen a comb....
My cousin almost got us killed popping of at the mouth at the police, those bi-rascals forget that their white parent can't stop them from getting a cap in their a**.