D/S or D/s means "Dominance and Submission." It is commonly written with an uppercase 'D' and a lowercase 's' to signify Dominant and submissive. D/s is one element of BDSM (Bondage and Discipline, Dominance and Submission, and Sadomasochism).
Got this from Google
Anyway does someone have more bdsm recs??? I need them so bad