BDSM: sub, slave, little, bottom, pet, property...What the heck?!

I do not own this photo. Found on Google.

I have noticed something during my research and experiences in the lifestyle. No one seems to agree on the exact definitions of ANYTHING. The sooner one realizes this, the better. I mean, the general understanding of what a sub is can be basically the same thing across the board, but even that depends on who you're talking to.
The other day I was speaking to a man who assumed that sub meant that it was just a bedroom thing and slave was the term when one is submissive in the bedroom. This struck me as odd because I've always been under the impression that:

    Bottom = bedroom
    Sub = submissive but with limits
    Slave = completely owned with no limits.

 But maybe I'm the one who has it wrong!

Then there are the other terms such as little (subs who identify as little boys/girls), pet (this could mean sooo many things but I've mostly seen it applied to kitten/puppy play) and property. When it comes to BDSM, the terminology is endless and always evolving, but the key is to figure out what term works best for you and always openly communicate what a word means to you when talking to others. Miscommunication should always be avoided AT ANY COST in the lifestyle.

Maybe I should post a personal BDSM vocabulary list to educate all of my vanilla (non-kinky) readers. What do you guys think?