polycurious - one interested in polyamory, but not quite ready to engage in the practices yet
bicurious - interested in both sexes, not practicing actual sex yet, or just having sex with one just men or just women, not both yet
biemotional - (as i've been led to beleive) is when one woman romantically loves another woman, but no touchy feely is going on
Domme - female Dominant
vanilla sex - sex without bdsm
ssc - abbreviation for safe, sane and consensual which means that everything is based on safe, sane and consenting behavior of all involved parties. This mutual consent makes a clear legal and ethical distinction between BDSM and crimes such as sexual assault or domestic violence.
safeword - is a codeword or series of codewords that are sometimes used in BDSM for a submissive (or "bottom") to unambiguously communicate their physical or emotional state to a dominant (or "top"), typically when approaching, or crossing, a physical, emotional, or moral boundary. Some safewords are used to stop the scene outright, while others can communicate a willingness to continue, but at a reduced level of intensity.
subspace aka headspace aka flying aka floating - is a metaphor for the state the bottom's mind and body is in during a deeply involved play scene. Many types of BDSM play invoke strong physical responses. The psychological aspect of BDSM also causes many bottoms to mentally separate themselves from their environment as they process the experience. Deep subspace is often characterized as a state of deep recession and incoherence. Deep subspace may also cause a danger in newer bottoms who are unfamiliar with the experience, and require the dominant to keep a careful watch to ensure the bottom isn't placing him or her self in danger. Many bottoms require aftercare while returning from subspace
playing - Many BDSM practitioners regard the practice of BDSM in their sex life as sexual roleplaying and therefore speak of "Play" and "Playing". The execution of such play is termed a "Session", and the contents and the circumstances of the play are often referred to as a "Scene"
TPE - abbreviation for Total power exchange
collar - (in BDSM terms) is a device of any material placed around the neck of the submissive partner. It is also a term used to show ownership of one partner by another. A person wearing a collar to symbolize their relationship with another is said to be collared. Some people conduct formal "collaring ceremonies," which are regarded as effectively solemnizing their relationship in a similar way as a marriage ceremony.