jeans highlighting the flat curvature of the 40+ buttocks. Similies: upside-down-heart shaped-butt. Commonly seen aacompained with front butt. Extremly high waist, and always a crappy shade of blue or black. Usually found in Kohl's or Mervyn's.
"Susie, now that youve had 10 kids, lets get you into some mom jeans.."