Applied to men, barrel chested and broad-shouldered with nicely-shaped legs and a solid, substantial body.
Applied to women, broad-hipped and womanly with lots of voluptuous curves and generously endowed in the butt and breasts.
She was a tall, buxom girl with blue eyes and a head of thick cinnamon curls that fell almost to her waist. She smugly sashayed down the street, her low neckline together with her big hips and posterior drawing the eyes of many a young male.
Now it refers to a woman with a full figure, voluptuous curves and generously endowed in the bust and hips (as opposed to the bone-thin supermodels shown in the media).
Think of Jennifer Hudson, Beyonce, Kelly Clarkson, Sara Ramirez, Queen Latifah, Kate Winslet, Marilyn Monroe, Anna Nicole Smith, Mia Tyler, Chloe Agnew, America Ferrera, among others.