waistline
waist.line \'wa-st-.li-n\ n 1: an arbitrary line encircling the narrowest part of the waist; also : the part of a garment that covers this line or may be above or below it as fashion dictates 2: body circumference at the waist
waist.line \'wa-st-.li-n\ n 1: an arbitrary line encircling the narrowest part of the waist; also : the part of a garment that covers this line or may be above or below it as fashion dictates 2: body circumference at the waist