The practice of letting somebody in your social group get away with something normally punishable, solely by virtue of their gender.
Men in a bar will often give a woman a sexemption from paying for drinks.
Women at a homecooked dinner will often give a male diner a free pass from having to do the dishes.
There's a female poster on this games forum who keeps doing things that nobody would put up with in a guy poster. But I guess most of the other posters are dudes, and they don't want to scare her off, so she gets sexemption for now.