The phrase "saggy butt" refers to someone's buttocks or rear end appearing loose or droopy, often due to lack of muscle tone or aging. It means that their buttocks don't have a firm or lifted appearance.
Sentences with «saggy butt»
Overall, Recess: School's Out is fairly harmless with its treehouse scenes and G - rated saggy butt jokes. (dvdizzy.com)
With the added weight on the back end, many 4Runners of the generation suffer from saggy butt syndrome. (curbsideclassic.com)