A young person who has, well, an ass like a mom has.

Something you yell at a really hot mother when she is walking down the street with her children, and make sure you are in a car.

What becomes of a butt wearing Mom Jeans.

This is encouraged by pulling your jeans up to your belly button. You will notice that the ass looks elongated and flat.

This is not sexy. This is not even attractive.

A mom's ass that looks like it was destroyed in the 80s and 90s and looks like a diaper. Especially when she wears sweat pants. Droops ever downward and looks and smells like cottage cheese. Sometimes, looks like a box when wearing tight jeans.

a girl's buttocks that sags with wrinkles near the thigh area but yet is flatter than a homeless woman's chest on crack. This is usually obtained by a woman sitting in an office chair all day, every day.