1. RustyBUTT-cheeks is when you still got poop in between your cheeks.
2. My version of rusty butt cheeks would be butt cheeks that are unused for a long time, but at one time was used lots = RustyBUTT-cheeks
3. What you call anal sex without Lube dry anal sex= RustyBUTT-cheeks
I'm going to make those rusty buttcheeks work again.
When I was walking down the road I felt something itchy, later in the bathroom when I wiped, I had rusty buttcheeks.
Babe get out your Lube, you got rusty buttcheeks