General Terms

choc = chocobo
ah = auction house
pt = party
seek = "seek party"
join = "select join" (under party menu)
lvl = level
lvling = gaining levels
t = tell (/t chat command)
brb = be right back
btw = by the way
atm = at the moment
afk = away from keyboard/not available
omw - On my way
GUI/UI - Graphical User Interface
GM - Game Master
LFG/LFP - Looking For Group/Party
m# - Mission followed by the number (ex. Mission 5 is m5)
RSE - Race Specific Equipment
AF - Artifact Armor
TNL - To next level

Job Terms

rdm = red mage
blm = black mage
whm = white mage
war = warrior
mnk = monk
thf = theif
nin = ninja
smn / sum = summoner
rng = ranger
pal = paladin
bst = beastmaster
drk = dark knight
sam = samurai
drg = dragoon

Places

san = San D'Oria
wind / windy = Windurst
bast = Bastok
NGusta - North Gustaberg
SGusta - South Gustaberg
WRon - West Ronfaure
ERon - East Ronfaure
WSarta - West Sarutabaruta
ESarta - East Sarutabaruta
Dunes/Desert - Valkurm Dunes
LT - La Theine
Pal - Palbourough Mines

Party Communication

(monster is) aggro = monster will attack without provocation
pull = lure a monster to a safer area (also called fishing)
voke = use provoke command (for warriors)
nuke = repeatedly cast a spell as fast as possible on a single target
ws = weapon skill
chain / renkei = skillchain
burst = magic burst
run = just that -- RUN (the most common party command!)
oom - Out of magic
inc - Monster is being pulled to the party
add/link - Two or more enemies come with the pulled monster.

Abilities

2hr - Two-hour ability
PD - Perfect Dodge (Thief)
Sneak/SA - Sneak Attack (Thief)
Trick/TA - Trick Attack (Thief)

Enjoy, ladies and gentlemen. Updates are bound to come. For any questions or additions, email me at the_briarpatch@adelphia.net, or contact me through AIM, my name is "iBriar", or through MSN Messenger, my address being the_briarpatch@hotmail.com. If you deem fit, PayPal donations can be made, contact me for details. Supporting the Final Fantasy XI community is hard work, you know. :-)