1/2 a perky butt

female; 'perky' butt just starting to get sloppy, the once hypnotic effect now being etched away by human chronological erosion, high fat foods, and/or; lack of exercise, mechanical dependence.

(ie; human physical degradation) a sad state of (human) affairs....-'DEATH! of a 'perky butt'!! (song by 'the Mighty Tits', rock band!)