The term JUMPER LINE can be solved by the three letter word HEM. A HEM is a line of stitching that is used to finish the edge of a garment or piece of fabric. It is usually done by folding the fabric over and then stitching it in place. Hems are often used to reinforce the edges of clothing, such as on the sleeves or bottom of a shirt. They can also be used to create decorative edges on garments, such as on the neckline of a dress.