anti slut defense is basically the process that women conciously or unconciously follow to avoid the perception of being slutty or easy. lots of women are so afraid of being judge sluts that they will actually go out of there way to be perceived as nice girls or good girls. they will usually proclaim indifference to sex when actually they want it just as bas as the guy does. most AFC will take this for its face value and just give up. but being PUA we know this as a test and an obstacle to overcome to get her in ur bed that night.