Cellulite is a fat deposit beneath the skin. The main symptom is the appearance of lumpy, dimpled flesh on the thighs, hips, buttocks, and belly. Cellulite is much more common in women than in men. Weight gain can make cellulite more noticeable, but some lean people have cellulite, as well. It tends to run in families, so genetics might play the biggest role in whether you develop cellulite. Weight loss and exercise can help improve the appearance of cellulite.