1932- Betty Boop - Betty Boop museum

" Betty Boop is noteworthy for being the first cartoon character to fully represent a sexual woman. Other female characters of the same period showed their panties regularly, like Minnie Mouse, but didn't have a full caricature of a woman's form. Betty Boop, however, reveled in her sexuality. She wore short dresses and a garter belt. Her breasts were prominent, and she showed her cleavage. In her cartoons, other characters try to sneak peeks at her while she's changing. In Betty Boop's Bamboo Isle, she does the hula wearing only a lei and a grass skirt, a bit she repeated in her cameo appearance in the first Popeye cartoon. " (Source: Wikipedia)