hacker's ass
Your ass gets so sore from sitting like a fool that it feels like it's on fire. Hackers get this because they think their ass is a chair.
My ass is so sore I can feel every pixel on my screen. Hacker's ass is the worst.
I sat through a whole lecture. My ass is now a hot dog.
I coded so much my ass is now a pizza. It's cheesy and sore.