Lets say a guy dates this girl in college. After a year and a half, she abruptly turns very mean on him and breaks it off. Then, she (who had been a virgin before this
relationship, no less) promptly goes and screws two of his
fraternity brothers/friends, who also happen to be each others
biological brothers (!). She winds up dating the second one for a year or two (!!!) thus qualifying herself as "slunk meat".