cotton butt
When you leave the bathroom with toilet paper stuck to your butt.
Hey look at that guy, he's got cotton butt! He must have made a huge shit!
butt cotton
Another way of saying toilet paper. Instead just say butt cotton because toilet paper feels like cotton (sometimes). And the first word “butt” is touched by the butt cotton before the sheet goes in the toilet.
Mum, we need more butt cotton in the bathroom!