Ba (or 3) + name
It's like giving someone a middle finger with a nickname. You take 'Ba' and slap it on someone's name like they just failed a math test while wearing socks on their hands.
Ba Ssumi, you're a walking embarrassment.
Ba Bora, you're so dumb, you think a river is a napkin.
Ba Kena, you're like a broken toaster trying to make coffee.