WoW abbreviations and lingoFollow

Good morning fellow WoWers, I am fairly new to the game (only have been playing for about a month now) and I have experienced some frustration and confusion when interacting with other players when they use abbreviations. I learned "PST" over time means to whisper but I can not figure out any other ones.

I can't imagine I am the only new player who has trouble with this and was wondering if someone would be kind enough to type out a list of common WoW abbreviations? Also I feel it may be helpful if an admin. stickies this topic so that future noobs like myself could quickly find it. Thank you in advance!

Here is an excellent list of acronyms and shortforms.

DM can be both Deadmines and Dire Maul, but most often Dire Maul will be called "DM east" "DM west" "DM north" because it's 3 sections.
In Dire Maul there is a lot of very nice stuff to find, much of it are for droods tho but there are important and very valuable drops for every class. Too bad not so many go venturing in groups there anymore.. end of rant