A.D.S. stands for Addicted Dick Sucker for people of the female persuasion that enjoy to suck cocks and the yum-tastic flavor that "cums" from the average female whore's pastime of slobbering away on pork swords.
Person 1: That bitch be sucking on my Big Rick every minute she get.
Person 2: Shit, that's some pure A.D.S. right thur.