Bottom: the person being spanked.
LGBTQ: lesbian, gay, bisexual, transgender, and queer or questioning.
Lurker: someone who reads a blog but does not comment (which is called lurking).
OTK: Over The Knee, with the person being spanked face down over the knee of the top.
Top: the person doing the spanking.
Vanilla: the sexuality that society expects. Vanilla sex, for instance, is typically penis-in-vagina. This is in contrast to kinky sex (whether it involves spanking or other activites).
Are there other terms you’d like to see? Please let me know, at doc.tsai@gmail.com.