hairy butterfly
When your butt is so hairy, it looks like a moth got stuck in your pants and died.
My dad's butt is a hairy butterfly. He says it's from sitting on a bench for 20 years.
She said her butt was a hairy butterfly. I asked if it had wings. She said it had a stink.
He called my butt a hairy butterfly. I called him a stinkin' moth.