I'm just slappin your ballsack - A ridiculous way of saying you're being a total idiot and no

A ridiculous way of saying you're being a total idiot and not even trying to be serious.

I'm just slappin your ballsack, you silly goose. That was a dumb move.

I'm just slappin your ballsack, you blithering idiot. I'm still your friend.

I'm just slappin your ballsack, you moron. You're still the worst.