(word) = In-game emotes that people sometimes use when typing or speaking.

A

A> = Auctioning
Aco = An acolyte
AFK = Away From Keyboard
AFKemist = a biochemist, usually in OD2, who uses a certain style of Homunculus A.I. which allows them to level in absentia.
Alt = An alternate character
Alt/tab = Command for switching programs (see AFK)
AoE = Area of Effect (usually used in regards to a skill or spell that targets an area)

B

B> = Buying
BB = Bowling Bash (A knight skill)
BBS = Bulletin Board System (The old forums)
BF = 1. Boyfriend 2. Best Friend
BGM = Background Music
BL = Base level
Bot = An illegal computer controlled character
BS = 1. Blacksmith 2. Backstab (A rogue skill)
Buff = Anything that raises a character’s abilities

C

C/O = Current Offer (An auction term)
Char = Character
CM/FM = Community Moderator/Forum Moderator. Like A GM except in the forums.

D

DB = Dead branch (An item used for summoning a monster)
DD = Double Dagger (An assassin build which utilizes two daggers, one in each hand)

E

Ein = Einbroch (A town reached by airship)
Elu = Elunium (Used to refine armor, usually expensive)
Emp = Emperium (Used to create a guild or part of WoE)
Eru Sunnies = Erudite Sunglasses (An item from an old event, they are rare and very expensive)
Exp = 1. Experience 2. Expensive

F

FS = Full Support (A type of priest build which is used for healing and buffing)
FTB = Female Thief Bug

G

GC = Grand Cross Crusader (A type of crusader build that uses primarily magic)
GD = Guild Dungeon
GF = 1. Guillotine Fist (A monk Skill) 2. Girlfriend
GH = Glast Heim (A dungeon, usually warped to by a priest, filled with undead & evil)
GM = Game moderater (’Big Brother’ these are the guys you answer to)
GR = Guild Recruiting
GS = Gunslinger
GTB = Gold Thief Bug

H

HP = 1. Health points 2. Hocus Pocus (A sage skill. Used to be a linchpin for parties, now not so much.) 3. High Priest (Transcendent priest)

I

I/S = Instant Sale Price (An auction term)
ID = Ice Dungeon (new dungeon added with Rachel patch)
iRO = International Ragnarok Online (jRO = Japanese RO and so on and so forth)

J

JL = Job Level

K

KS = Kill Steal

L

L/I = Leave Information
L/N = Leave Name

L/O = Leave Offer

LK = Lord Knight (The transcendent form of a knight)
Loot = Items a monster drops.
Looting = Stealing another person’s loot.

Lou = Louyang (A town reached from Alberta, used as a training ground)

Lvl = Level

LY = Louyang

M

ME = Magnus Exorcismus (A type of priest build that uses magic and fast cast time to deal damage)
MTB = Male Thief Bug
MVP = Most valuable player (A type of monster with a special drop for the best fighter)

N

N> = Need
Nerf = Anything that makes a character weaker. (A change in game mechanics or a magic spell)
Newb = A new inexperienced player
Niff = Nifflheim (dungeon and/or city)
Noob = A new inexperienced player (Alternate form of Newb, sometimes used as a derogative)
NPC = Non-player character (Official computer controlled people)

O

OD = Orc Dungeon
OD2 = Orc Dungeon second floor (Used by AFK alchemists, good for noobs to get money)
Ori = Oridicon (Used to refine level 3 & 4 weapons)

P

Phen = A Phen card (Usually compounded as a “Clip under a cast,” used by many magic using characters)
Plox = A way of saying please that many consider immature and rude.
Pls = A lazy way of saying “please”
Plz = see “Pls”
Poly = Used by alchemists to summon a monster (can be used in town)
Pot = A potion
PVM = Player versus monster
PVP = Player versus player (kill your friends ^_^)

Q

R

RO = Ragnarok Online
ROE = roempire.com
RI = ragnainfo.net (A resource site, excellent information, poor forums)

S

S> = Selling
Sader = Crusader
Sac = Sacrifice (Crusader skill that absorbs damage dealt to allies, a build incorporating this skill is one of the best tanks in the game.)
Sin = Assassin
SinX = Assassin Cross (Transcendent form of the assassin)
SL = Soul Linker
Slims = Special potions that weigh less than other potions (made by an alchemist usually for WoE)
SN = Super Novice
SP = Magic Points

T

T> = Trade
Tank = A character which takes damage for the party. (Usually has very high vitality)
TI = Turtle Island
TK = Taekwon class character, or Taekwon Kid
TKM = Taekwon Master

U

V

W, X, Y. & Z

WoE = War of Emperium (Server-wide guild wars which happen every Wednesday and Saturday)

Created by Sera
Please help me update! Thanks to the contributers!