A scrunchie bum refers to a design feature commonly found in athletic wear, particularly in leggings, shorts, and swimsuits. It involves gathering or ruching the fabric along the backside, typically at the center seam, to create a flattering and accentuated look for the buttocks. The gathered fabric creates a “scrunching” effect, which enhances the appearance of the buttocks, making them appear lifted, rounded, and more defined.

This design detail has become popular in activewear and swimwear because it enhances the wearer’s curves and accentuates the natural shape of the body. Many people find scrunch bum styles to be flattering and confidence-boosting, especially during workouts or when wearing swimwear. Scrunch bum leggings, shorts, and swimsuits are often favored by individuals seeking to enhance their silhouette and feel more confident in their clothing.