it’s just what it sounds like, your hips have a slight inward dip instead of an outward curve. it has to do with hip bone structure. i have them and with me and other skinny people you barely even notice them, clothes make them practically unnoticeable, but with obeast the fat in the stomach and thighs make it much more pronounced and visible(and disgusting).  here’s an example of a human female with a hip dip http://magaimg.net/img/8al2.jpg