aw, glad to be a philanthropist for higher education.........
serosorter: one who sorts potential sex partners by HIV serostatus, usually referring to poz guys who like to only have bareback sex with other poz guys (not into the whole bugchasing or giftgiving schtick). term was brought into public consciousness over the past year in numerous publications, most notably by Dan Savage in Savage Love
"Dude, you stand no chance with him. You're neg and he's not only poz, he's a serosorter"