From The Art and Popular Culture Encyclopedia
Kink is a term used to refer to a broad range of sexual practices such as spanking, bondage, domination and submission, sadomasochism and sexual fetishism. BDSM is a term that has developed over time to represent the full range of kinky behavior, and not just those represented by the acronym.
It is important to note that the definition of what is and is not kinky can be quite subjective.
Someone who is "into kinks" is also referred to as being kinky. A kinkster is a friendly term used in the BDSM community to refer to someone else who also participates in BDSM activities.
The Internet has had an enormous impact on facilitating communication among kinky people and bringing them together as well as raising awareness of kinks among those who would have otherwise never been exposed to them.