"Female hypergamy" (from now on, just "hypergamy") is a supposed tendency for women to seek husbands who are higher-status than themselves. Arguing about educational hypergamy (women seeking husbands who are more educated than themselves) is especially popular, because women are now (on average) more educated than men - if every woman wants a more-educated husband, most won't get them, and there will be some kind of crisis.

https://astralcodexten.substack.com/p/hypergamy-much-more-than-you-wanted