BDSM
An overlapping abbreviation of Bondage and Discipline (BD), Dominance and Submission (DS), Sadism and Masochism (SM).

Bondage - Tying up or restraining your consenting sexual partner. Usually the restraining is done by the dom (dominant) and the sub (submissive) is the one restrained with handcuffs, rope, leather, scarves, rubber, cling film, chains etc. Sexually arousing for some, as the exchange of power is exciting, and the helplessness of being bound allows some people to really let go and enjoy themselves. Also, having complete control over a willing partner is very arousing.

Discipline - Any activity in which one person trains another person to act or behave in a specified way, often by enforcing rigid codes of conduct or by inflicting punishment - i.e spanking - for failure to behave in the prescribed way.

Dominance - A person in BDSM who dominates a submissive person. Usually the one who disciplines or ties up the submissive person and/or the top (the person who ties up, punishes etc. the submissive person).

Submission - A person in BDSM who submits to a dominant person. A submissive can be a slave and/or the bottom (the person being tied up or whipped, etc.).

Sadism - The tendency to derive pleasure, especially sexual gratification, from inflicting pain, suffering, or humiliation on others.

Masochism - the tendency to derive pleasure, especially sexual gratification, from one's own pain or humiliation.
"I like BDSM."