Sort of OT, but its going to bug me until I ask....
For us semi-newbies, and for the total newbies, I have to ask this. Please be gentle as you razz me for ignorance.

What do some of the terms I see used all the time mean? Like OP, OTP, BNF, and AU? Or any other terms there might be. Can we possibly get a guide for the clueless?

Thank you for your time. Feel free to commence with the finger pointing and laughing.

EDIT: Saying thank you to all of you who responded here, instead of trying to catch up with each individual post (I admit it, I'm lazy as hell). It warms my heart that you all responded so nicely, instead of raking this newbie and others over the coals. Such lovely people here......