What is a cotton headed ninny muggin?

Hello, I'm thebe kgositsile, and i lived in Africa for 45 years. Back in Africa we call dem cotton-headed-ninny-muggins the white people that invade our land. In North Africa we are tired of cotton picking. GIVE US GRAPE SODA/CHICKEN/Kool-Aid/BARBEQUE CHIPS/ AND WATERMELON YOU COTTON-HEADED-NINNY-MUGGINS.