ladies who lunch women with the money and free time to meet for social lunches. informal

☞ This expression comes from the title of a 1970s song by Stephen Sondheim: 'A toast to that invincible bunch…Let's hear it for the ladies who lunch'. While it is often used of women who raise money for charity by organizing fashionable lunches, it is also often used in a derogatory way of women with the money and leisure to lunch at expensive restaurants.