Pain slut
From wipipedia.org
A pain slut is someone, male or female, who has a high sexual attachment to severe pain. The term is largely interchangable with the term Masochist, but it is often used to describe someone whose primary sexual drive is the receiving of pain and is vocal about his/her needs in this regard, especially when, as with a sexual slut, they are not very discriminating in their choice of partner.
