How attractive someone is as a potential mate. Based on things like beauty/hotness, wealth, intelligence, etc. Different qualities impact mate value in different cultures, and mate value is evaluated somewhat differently for guys versus girls.
Why is it that I keep getting fixed up with guys with super-low mate value?!? I am not lowering my standards!!!
You better get yourself to Victoria's Secret and buy yourself a push-up bra. Them there snowbirds look like they're heading south for the winter. You gotta wear an underwire to prevent that kind of migration!