What's the polite way to call someone a lil bitch. Genuinely curious because I wanna be PC but also an asshole. Anyway the creature in the post is a lil bitch ass

I believe that the most socially acceptable way would be (and remember that it's an example, and not directed at you):

"fuck you, and your lil bitch ass attitude. You don't know your father because he never even liked you, your mother blows strangers for bags of gummy bears and validation, and your ears look weird"