1. The Land Maps Abbreviation:
Clan maps :
WT - Wu Tang Shan (Wu Tang Clan Base)
SS - Song Shan (Shaolin Clan Base)
TJ - Taijin (League of Beggars Clan Base)
ZD - Zian Dong (Sacred Flower Clan Base)
MtY - Mount Yanmo (Heavenly Demon Clan Base)
TS - Tai Shan (Brotherhood of Theives Clan Base)
Game maps :
ZZ - ZhengZhou (CoF for White Clans)
SZ - ShiZhang (CoF for Black Clans)
JN - Jinan EVoh - Eastern Valley of Hell and VoH )
DT - Datong (VoH - Western Valley of Hell and VoH here)
NC - Nanchang
HZ - HangZhou
LD - Liaodong
KL : Kunlun
PvP maps :

BP - Bloody Plains (appears as Southern Death Valley in party and HB/HL lists)
CC or CoC - Conqueror's Cave : followed by a number ie. CC3 which means conquer cave 3rd level
LL : Loulan

2. Dungeons Abbreviation:
COF (The Choice of Fate)
COF (The Choice of Fate) Superior
VOH (The Judgement of Hell )
VOH (The Judgement of Hell) Superior
COC (The Cave of The Conqueror) Dungeoun
SCM (Silver Coin Mansion Guide)
SCM (Silver Coin Mansion Guide) Superior
WT (Wild Tower )
WT (Wild Tower ) Superior
BT (Beast Tower )
BT (Beast Tower) Superior
GCM (Mansion of Golden Coin )
GCM (Mansion of Golden Coin) Superior
SRS (School of Rising Sun Guide)
SRS (School of Rising Sun Guide) Superior
Icy (North Sea Icy Palace Dungeon)
KJ (King Jin Dungeon Guide)
BM (The Black Monks Dungeon )
Kylin (East /West Temple Dungeon Loulan )
ID ( Infinite Dungeon )
Potala ( Potala Palace)

3. Level (Range) Abbreviation
None (0) (None)
Losing Self (1-12) (LS)
Gathering Chi (13-24) (GC)
Opening Chi (25-36) (OC)
Revolving Chakra (37-48) (RC)
Raising Light (49-60) (RL)
Five Dragons (61-72) (FD)
Sun and Moon (73-84) (SM)
Golden Blossoms (85-96) (GB)
Elemental Crown (97-108) (EC)
Floral Crown (109-120) (FC)
Crimson Snake (121-132) (CS)
Golden Lotus (133-144) (GL)
Humble Master (145-156) (HM)
Little Master (157-168) (LM)
Hermit (169-180) (H)
Projected Soul (181-192) (PS)
Dissolved Body (193-204) (DB)
Immortal (205-216) (I)
Heaven's Gate (217-228) (HG)
Heavenly Immortal (229-240) (HI)

4. Clans/Bands/Leagues Abbreviation:

WC - White Clans
WT - Wu Tang
Sha0 - Shaolin
LoB - League of Beggars

BC - Black Clans
SF - Sacred Flower
HD - Heavenly Demons
BoT - Brotherhood of Theives

TV/PV - True Vagabond/Pure Vagabond

Bands:
HB - Hero Band
HL - Hero League
BM - Band Master/Band Mate/Band Member
LM - League Master/League Mate/League Member
LsM - League Sub Master
BL - Band Leader

5. Game content Abbreviation:
SvS - Storm Versus Storm (Two leagues fight for the rights to own a Fortress)
BW - Band Wars (war between two or more Hero Bands)
CW - Clan Wars (war between two or more clans)
BvW - Black Versus White Wars (War where Black Clans versus White Clans.)

6. Marketplace & Items Abbreviation:
WTB - Want to Buy
WTS - Want to Sell
WTT - Want to Trade
PM - Private Message/Pigeongram/Pigeon Message

Items:
Adv - advanced (applies to manuals for skills or experience boosts)
Med - Meditaion
Meds - Medium Beads
BE - Blood Essence (highly sought efter item used for weapon refinement)
BM - Blood Mushroom (Elixer Suppliment that increases success)
BSM - Blue Stone Mushroom (Elixer Suppliment that greatly increases chance of success)
LF - Lightfoot (skill which inreases running speed)
WD - Wan Daye
WB - Wrist Bands
Rel - Relic
Man - Manual
Weap - Weapons
Cloth - Clothes
Coll - Colletions/Collectables
Ref - Refined (normally accompanied by an number ie. EC4 +5 Sabre)
10K - Ten thousand / 10 000
10mil - Ten million / 10 000 000
10KK - Ten million / 10 000 000
Elix - Elixers (normally with level and stat ie. lvl3 ess elix)
KG - Korean Ginseng (heals 100% HP instantly)
EM - Ethereal Mushroom (heals 100% VE instantly)
Inner - Inner Clothes
BOF - Bead of Frost
BOFFM - Bead of Frosted Full Moon
FS - Flowstones
GT - Golden Threat
Epi - Epithet
MCG - Master Crafting Guide
LF Pill - Life
VE Pill - Vital Energy
EW Pill - External Wounds
TS - Tender Stone
MKSB - Magical Kunlun Silk Belt
MKSC - Magical Kunlun Silk Cloth
+14, +15 - Refinament level
BO - Bloody Orb

7. Character (C) Abbreviation:
Str - Strength
Ess - Essence
Wis - Wisdom
Con - Constition
Dex - Dexterity
** - Chi Kung
PvP - Player Versus Player
PvE - Player verses Environment
KS - Kill Steal
KoS - Kill on Sight
PK - Player Kill
** - Chi Kung
EW - External Wounds
IW - Internal Wounds
HP - Health Point / Hit Points
VE - Vital Energy
Stat - Statistic (eg. Strength, Wisdom etc).
Def - Defence
AR - Attack rating
CKAR - Chi Kung Attack Rating
CKDef - Chi Kung Defence
Dam - Damage
CKDam - Chi Kung Damage
GK - Good Karma
BK - Bad Karma
Crit - Critical / Critical Rate
CKCrit - Chi Kung Critical / Chi Kung Critical Rate
XP/Exp - Experience
BP - Blood Points
BC - Blood Count
Char - Character
Para - Paralise (nuke, smashing or skill)
KO - Knocked out (Before entering comatose state)
Epi/Epit - Epitaph / Epitet
Res/Rez - Resurect
Y&Y -Ying & Yang
B&S - Body & Soul

8. General Chat and Miscellaneous Abbreviation:

PQ - Party Quest
Q - Quest (not often used) / Question
Plz/plz - Please
Ty - thank you
Tyvm - thank you very much
KK - ok ok / kewl kewl / cool cool
PP - party please
AFK - Away From Keyboard
AFG - Away from game (still logged in and on computer but not active in game)
btw - by the way
atm - at the moment
sis - sister (form of address to female character)
bro - brother (form of address to male character)
omw - on my way
GG/gg - good grind / good game / game guard
gl - good luck
gd - good drops
bts - be there soon
OMG - Oh My God
W.T.F - What the F@DC. d/c - disconnect
MM - Meng Mian (Cof Boss killer epi for white)
MSH - Mei San-He (VoH Boss killer epi for white)
SM - Sheng Mian (CoF Boss killer epi for black)
SYL - Shao Yu-Lang (VoH boss killer epi for black)
SM/KSM - Shen Mo/Killer of Shen Mo (Annother Epi)
TGW - True General Wei (CC5 boss)
KoG - Killer of Ghosts (Mansion Epi)
KoB - Killer of Beasts (Wild Tower Epi)
No0b/noob/n00b - Never owened online before / low level / inexperienced player / insult / character that follow higher levels and askes for free things (most annoying)
Newbie - New in Game / inexperienced player
Lowbie - low level character
wc - wrong chat
yw - your welcome
np - no problem
brt - be right there
bb - bye bye
gb - good bye
wb - welcome back
cya - see you later / see you after / bye
ttyl - talk to you later
w/[said word] - with [said word]
lol - laugh out loud
rofl - rolling on floor laughing
roflol - rolling on floor laughing out loud
roflmao - rolling on floor laughing my arse off
lmao - laughing my arse off
wo0t/woot/w00t - we own other teams / expresion of happiness
SS - Screen shot (press print screen button while in game and appears in program files 9Dragons capture character name)
Cam on - Camera on / Video on
Note: anything that appears in your game chat as ******** is something that the chat filter has found rude offensive and inappropriate weather it be intentional or accidental.

PS : feel free to share more to add.