hooking up with someone repeatedly when one or both partners have an emotional attachment to their partner; i.e. one-night stands and other sexual encounters with no promise of commitment over a number of years. usually leads to heartbreak, drama, pining, and complaints about having wasted energy over a relationship.
1) They've been hooking up since freshman year of college. We've graduated and live in New York now. Six years! This isn't just your casual one-night stand anymore...this is a hookup of attrition.
2) Don't pay attention to her when she talks about that guy. Their relationship is a hookup of attrition.
3) He's hitting himself upside the head because his hookup of attrition is being a bitch again.