Boomafu
A Boomafu is someone who is without a doubt stupid when it comes to the most common sense understanding of anything in life.
"Melody asked what did I mean when I told her we were taking surveys for money. She didn't get it after three explanations of how to make money by taking the surveys, said she didn't understand"
"She's a damn Boomafu"
"She's a damn Boomafu"