"Black jeggings" refers to a type of clothing that is a combination of jeans and leggings. They look like tight-fitting black pants, but are made with stretchy fabric similar to leggings for comfort and flexibility. Full definition
A scoop - neck red kurti paired with black jeggings will definitely make heads turn as you hangout with friends at the mall, while the designer kurtis with mandarin collars look smart and exquisite at semi-formal or formal gatherings. (myntra.com)