I smack butt cheeks: The First Juvenile Release.
I hit your butt so hard, it might start a new sport and a new language.
I hit my brother’s butt so hard, he started a new sport: butt wrestling.
My friend’s butt was so sore, he said he’d invent a new language: Buttish.
I smacked my cousin’s butt so hard, he said he’d make it a school event.