Places:
Instances(by level):
ACoS - Arcane Chamber of Sathkur
WB - Windmill Basement (but more commonly used for "World Boss")
BG - Bloody Gallery -OR- Battleground(in other contexts)
FA - Forsaken Abbey
NoM - Necropolis of Mirrors
Labyrinth - Ystra Labyrinth
MA - Mystic Altar
PS (or "paspers") - Pasper's Shrine
KS - Kalin Shrine
clops - Cyclops Lair
TT - Treasure Trove
IDK35/IDK50 - Ruins of the Ice Dwarf Kingdom(level 35/50)
HotO - Heart of the Ocean
Water Dragon - Cave of the Water Dragon
HoS - Hall of Survivors
LoDD - Lair of the Demon Dragon
ZS/DL(or “ZS/DS”) - Zhuridon Stronghold/Hall of the Demon Lord (2 instances, most commonly run together)
DoD - Dungeon of Dalanis
WA - Warnoken Arena
RT - Rhaksha Temple
KT - Kawak's Tomb
VN - Varanas Nightmare
AKoM (or "Ambroriar") - Ancient Kingdom of Magnork(Ruins of the Magnork Kingdom)
GC - Grafu Castle
Rift - Bolynthia Rift
Osalon - Osalon Valley
SC - Sardo Castle
ToSH - Tomb of the Seven Heros
CV - Chaos Vortex
KBN - Kulech Bones Nest
AC - Aeternal Circle
CoB - Castle of Bedim
beth - Bethomia
bela - Belathis
Grotto(or "GoH") - Grotto of Horrors
PoM(or "pillars") - The Pillars of Morfan
CoE(or "crypt") - Crypt of Eternity
VC(or "veiled crypt") - Veiled Crypt of Kashaylan
BP - Bone Peak
RH - Raven Heart
TN - Madro Troll's Nest
Arcanium Chamber Instances:
HoE - Hall of Earth
HoW - Hall of Water
HoF - Hall of Fire
HoC - Hall of Chaos
(note: a -HM, -H, or -E on the end of an abbreviation indicates mode. -HM, -H is hard, -E is easy. Normal, or -N, is assumed if not specified)
Minigames:
CoT - Malatinas Course of Terror
ATH - Ancient Treasure Hunt
Tempest/TH - Spirit of Tempest Heights
Gobs/GG - Goblin Mines
Zones(by level):
YH/hollows/YHollows - Yrvandis Hollows(Dwarf starting zone)
Elven island - (elf starting zone)
HM - Howling Mountains(human starting zone)
Silverspring - Silverspring
SS - Sascilia Steppes
AV - Aslan Valley(or Aotulia Volcano)
CoO - Coast of Opportunity
DFR - Dragonfang Ridge
Ystra/YH - Ystra Highlands
Ravenfell - Ravenfell
Xav - Xaviera
DDC - Dust Devil Canyon
WC - Weeping Coast(or World Chat)
SL - Savage Lands
AV - Aotulia Volcano(or Aslan Valley)
THH/TH - Thunderhoof Hills
SJF - Southern Janost Forest
NJF - Northern Janost Forest
Limo - Limo Desert
LoM - Land of Malevolence
RM/redhill - Redhill Mountains
TB - Tergothen Bay
AKR/AKoR - Ancient Kingdom of Rorazan
Chrysalia - Chrysalia
MT/merdhin/tundra - Merdhin Tundra
SP/syrbal - Syrbal Pass(“SP” can also stand for Shadow Prison)
Sarlo - Sarlo
WF - Wailing Fjord
jungle/hortek - Jungle of Hortek
salioca - Salioca Basin
Kashay - Kashaylan
Splitwater - Splitwater Coast
Faristan - Moorlands of Faristan
Other Places:
OS - Obsidian Stronghold
SW - siege war
GC - guild castle (or grafu castle)
ToWW - Tower of Wailing Wind
(note: some instances and zones were included for sake of completion, even if they did not have an abbreviation)
Character and Stats:
Classes:
R - Rogue
S - Scout(human or elf)
K - Knight(human only)
M - Mage
W - Warrior
D - Druid(elf only)
Wdn/Wd - Warden(elf only)
Wl - Warlock(dwarf only)
C/Ch - Champion(dwarf only)
P - Priest(human or dwarf)
(note: in the context of classes, you'll see something like m/p/r/k/w which means their primary class is a mage, secondary is priest and then lists all the additional classes that character may have available; rogue, knight, and warrior in this example)
Stats:
str - strength
int - intelligence
wis - wisdom
dex - dexterity
stam - stamina
patk/pa - physical attack
matk/ma - magical attack
mdam/pdam - magical or physical damage
macc/pacc - magical or physical accuracy
mcrit/pcrit - magical or physical critical hit chance
hp - hit points (also known as LP <life points> on non US servers)
mp - mana points
Pdef - Physical Defense
Mdef - Magical Defense
HPB - Healing Power Bonus
DPS - Damage Per Second
Gear/Modding:
Dura - Durability of a piece of gear
OD(HD) - Over Dura(High Dura)
UD(LD) - Under Dura(Low Dura)
Skills:
ISS - Item Set Skill
amp - Amplified Attack(Priest Skill)
AoW (or "druid amp attack") - Awakening of the Wild(druid/warrior elite)
GoL - Grace of Life (also includes enhanced GoL from the priest/knight elite)(Priest Skill)
gramp/gramps - Grace of Life + Amplified Attack
sub (or "6%" or "wl buff") - sublimation weave curse(Warlock skill)
SoA (or "surge") - surge of awareness(Warlock skill)
flb - fire lightning burst(Warlock/Mage elite)
ecata (or cata) - elemental catalysis(Mage skill)
SS - Shadow Stab(Rogue skill)
LB - Low Blow(Rogue skill)
WA - Wound Attack(Rogue skill)
IBD - Illusion Blade Dance(Rogue/Mage elite)
ET - Enchanted Throw(Rogue/Mage elite)
SP - Shadow Prison (Rogue skill)
CT - Combo Throw (Rogue skill)
IB - Ice Blade (Priest/Scout elite)
CC - sometimes refers to crowd control (ability that disable/disorient enemies and prevent them from doing stuff), sometimes used to refer to Charged Chop(Warden skill)
PotWS/PoTS - Power of the Wood Spirit(Warden skill)
TS - Thunderstorm(Mage skill)
WPB - Will Power Blade(Warlock skill)
WPC - Will Power Construct(Warlock skill)
PSI - Psychic Points / Warlock point system for use while in WPB/WPC
EA - Enhanced Armor (Knight Skill)
Purg - Purgatory Fire (Mage Skill)
Turn, Friendly - Spirit Guidance (Druid Skill)
SB - Soul Bond (Priest Skill)
SotO - Spirit of the Oak (Warden Pet)
IWB - Ice Wind Blade (Priest/Mage Elite)
AoW - Awakening of the Wild (Druid/Warrior Elite)
Seeds - Withering and Weakening Seeds(Druid)
AD - Authoritative Deterrence (Knight/Warrior Elite)
MEF - Mother's Earth Fountain (Druid Skill)
Cams - Camilla Flowers (Druid/Scout Elite)
EoM - Essence of Magic (Mage/Priest Elite)
IBW - IronBlood Will(siege title skill)
FT - Fire Training(siege title skill)
SA - Soldiers Attack(siege title skill)
MR - Midnight Ritual(siege title skill)
TS - Tactical Smash(or Thunderstorm - mage))
sigil - short term buff that can appear after a enemy dies
Robot Chicken Form - Shield Form (Champion)
Items:
ABL - Advanced Bind Lifter
BL - Bind Lifter
Puri - Purified Fusion Stone
RAE's or random extractors - Random Attribute Extractors
jewels/plussing jewels/refining Jewels - usually refers to Starsplinter Jewels.
Golden Hammers - Golden Repair Hammer
Cleaners - Attribute Purifying Stone
Adv code/pack/bag - codes obtained from redeeming zeevex cards, they are redeemed in game for Adventurer Packages which contain Item shop goodies
BoE - Bind on Equip
BoP - Bind on Pickup
Currency:
Dias - Diamonds (the ones Gameforge sells)
PoM(or “proofs”) - proof of myth
mentos(or “mems”) - Ancient momentos
shells - phirius shells
EoJ's - energy of justice
ATC(or “charges”) - arcane transmuter charges
Ptokens/tokens - Phirius Tokens
Other Assorted Terminology:
Combat:
CD - cooldown (reuse time for a skill)
GCD - global cooldown. Most actions force all skills to undergo a short cooldown, visually seen by all skills on action bar flashing red. Some skills do not force GCD (and you may hear complaints about them)
CDS/cds/cd's - short duration buffs/skills with "longer" reuse times.
LoS - Line of Sight
Burn/burn phase/burns/burning/burst - high dps phase/group resulting in quick boss kills and/or high damage in short time
PvE - Player Vs. Environment
PvP - Player Vs. Player
XP - Experience Points
TP - Talent Points
HoT - Heal Over Time
DoT/bleeds - Damage Over Time
Combat(Siege Related):
Fast Feet, Speedy Feet, Happy Feet - Thunder Force
FoTs, treaches - Face of Treachery
Eyes - Eyes of True Knowledge
Flames and Electrics - Flame Towers and Electric Towers
Proc - Processing Factory
Bubble, Immune - Fearless
candy - immune candy(either magic or physical)
Trade/Chat:
CS/IS - cash shop/item shop
AH - Auction House
GC - Guild Chat
WC - World Chat
WTB - Willing To Buy
WTS - Willing To Sell
WTT - Willing To Trade
OBO - or best offer
PM - Private Message
PST - Please Send Tell
"w/m" - Whisper Me
WC, MT - wrong chat, miss tell
Addons:
AAH - Advanced Auction House
IP - Item Preview
CP, charplan - Character Planner
scrut - Scrutinizer
AAI - Auto Accept Invite
GCI - Grid Clique It
ILG - Invite Last Group
CoI - Come On In
DN - Daily Notes
UMM - Ultimate Mail Mod
DIYCE - do-it-yourself combat engine
Misc:
FotM - Flavor of the Month
UI - user interface
AT - arcane transmuter
WB - World Boss
HK - Housekeeper
GF - Gameforge
RW - Runewaker
GL - Guild Leader
GM - Game Master(aka: those that give players wonderful goodies)
OP - Over Powered
UP - Under Powered
Battlemonk - Priest/Warrior Combination
Warmage - Warrior/Mage Combination
Hippo - Wodjin
Spider - Mandara
special thanks to:
ruisen2000,
Ziav,
acypcar90,
BlankMinded,
CammoXD,
ghostwolf82,
camagic,
SHAYdynasty,
vfwiffo,
bleedingblak
I updated this list...please post if i forgot something or u have any complaints

...
thanks to majik the thread is cleaned for now...if any1 has anything to add/comment on, please drop a post and i will add it to the main list/fix it...