It can be used in several contexts, such as:
* Food: "Un fromage gras" (a fatty cheese)
* Body: "Avoir les cheveux gras" (to have greasy hair)
* Texture: "Une texture grasse" (a greasy texture)
* Figuratively: "Une blague grasse" (a crude joke)
It's important to note that "gras" can also be used to describe something as rich or luscious, especially in relation to food.