Your momma's neck is so old and wrinkled, I use it as a cheese grater
Your momma is so hairy bigfoot takes pictures of her
seriously, under all that hair yo Momma is really a Saint....a saint Bernard!
I should stop. I have nothing bad to say about Your Momma - heck, her face says it all...
And remember, if I wanted a comeback, I'd just wipe it off Your Momma's chin...