Ba (or 3) + name
This is the worst kind of insult. You take someone's name and turn it into a joke by adding 'Ba' like they're the worst player in the universe and they never bathed.
Ba Kellin, you're slower than a snail with a broken foot.
Ba Kight, you're like a donut that fell in the toilet.
Ba Jay, you're so stupid, you think a game is a nap.