"Side slits" refers to openings or cuts in the sides of a garment, usually seen in dresses, skirts, or shirts. These slits allow for increased movement, comfort, and sometimes add a stylish or revealing touch to the clothing item.
Drawstring waist with side slit pockets and rolled Hem and tab. (bobeau.com)
This satin slip features sheer lace at the neckline, a small navy rosebud at the center, lace bows at the ends, princess seams, a high side slit with scalloped lace trim, and a criss - cross and lace - up strap design with a tie closure on the back. (qunel.com)