Here are some common LEGO terms and acronyms you might find on the site and forums:
(Updated March 4, 2016)

Abbriviation	Description
3E/EEE	Maersk Triple E (10241)
AA	Arkham Asylum (10937)
AFOL	Adult Fan of Lego
ALE	Adult Lego Enthusiast - an easier to pronounce alternative to AFOL
AWD	Amazon Warehouse Deals
B&M or B+M	Brick and Mortar - stores that have a door you walk through to purchase your LEGO
B&N or BN	Barnes & Noble Book Store
B-A	Bold-Arrow (moderator)
BB	Brick Bank (10251)
BF	Black Friday
BI	Building Instructions
BL	Bricklink.com - Online stores for LEGO parts
BOGO	By One, Get One (the "Get One" is at some discount)
BP	Brick Picker
Brickpedia	Brickpedia.com - a LEGO Wiki
Brickset	Brickset.com - LEGO set guides
CAD	Computer Aided Design
CC	Cafe Corner (10182)
CMF	Collectible Mini Figures
CS	Customer Support or Creative Suitcase (10682)
CUUSOO	Former name of LEGO Ideas
DC	Dolphin Cruiser (41015)
DO	Detective's Office (10246)
DS	Death Star (10188) or Death Star
EDB	Epic Dragon Battle (9450)
EOL	End of Line - when a set is retired from Primary Market
ESB	Star Wars: The Empire Strikes Back
EU	Euro or European Union
EV	Ewok Village (10236)
F5	The key used to hit "refresh" for your browser, when something is going in an out of stock on a web page
FA	For Auction
FAQ	Frequently Asked Questions
FB	Fire Brigade (10197)
FBA	Fulfilled By Amazon
FH	Farnsworth House (21009)
FM	Fairground Mixer (10244)
FS	For Sale
FS/T, FSOT	For Sale or Trade
FT	For Trade
FW	Fallingwater (21005) or Ferris Wheel (10247)
FWIW	For What It's Worth
GC	Gift Card or Grand Carousel (10196)
GE	Grand Emporium (10211)
GG	Green Grocer (10185)
Greebles	Pseudo-technical detail added to a LEGO creation to enhance its appearance, frequently seen in LEGO space and mecha creations
GT	Gallimimus Trap (30320)
HH	Haunted House (10228)
HP	Harry Potter
IIRC	If I Remember/recall correctly
IJ	Indiana Jones
IMHO	In my honest opinion
IMO	In My Opinion
IR	Indominus Rex (75919)
ISD	Imperial Star Destroyer (75055, 10030, etc)
JP	Jabba's Palace (9516)
JW	Jurassic World
LM	The Lonely Mountain (79018)
LOL	Laugh Out Loud
MC	Minecraft or Mini Cooper MK VII (10242)
MF	Millenium Falcon (7965, 10179, 75105, etc) or Monster Fighters
MOC	My Own Creation - LEGO fan creation
MRSP	Manufacturer's Suggested Retail Price
MS	Market Street (10190)
MSC	Metalbeard's Sea Cow (70810)
OOS	Out Of Stock
OT	Original Trilogy - Star Wars Episodes 4, 5, 6
PC	Palace Cinema (10232)
PEE	Painting Easter Eggs (40121)
PR	Parisian Restaurant (10243)
PS	Pet Shop (10218)
QAR	Queen Anne's Revenge (4195)
QFLL	Quck Flip Low Life - someone who buys and sells quickly, usually when a set first comes out
R2	R2-D2 (10225, etc)
R5	Red Five X-Wing Starfighter (10240)
RE	Raptor Escape (75920)
Rebels	Star Wars: Rebels animated series
RI	Research Institute (21110)
ROI	Return On Investment
ROTJ	Star Wars: Return Of The Jedi
RR	Raptor Rampage (75917)
RRP	Recommended Retail Price
S1	Slave I (75060, etc)
S@H or SAH	Lego Shop At Home
SC	Sopwith Camel (10226) or Sandcrawler (75059) or Sea Cow (70810)
SD	Slickdeals.net - A website for shopping deals
SH	The Simpsons House (71006)
SOH	Sydney Opera House (10234 or 21012)
SSD	Super Star Destroyer (10221)
SW	Santa's Workshop (10245) or Star Wars
T1	Volkswagon T1 Camper Van (10220)
TB	Tower Bridge (10214)
TCW	Star Wars: The Clone Wars animated series
TF	TIE Fighter (75095, 75101, etc)
TFA	Star Wars: The Force Awakens
TH	Town Hall (10224)
TLG	The LEGO Group
TLM	The Lego Movie
ToA	Temple of Airjitsu (70751)
ToO	Tower of Orthanc (10237)
TOOS	Tempporarily Out Of Stock
ToT	Trick or Treat (40122)
TRU	Toys R Us
TRUST	Toys R Us 10% Discount Saturdays (usually in Nov/Dec)
TRUTH	Toys R Us 10% Discount Thursdays
UCS	Ultimate Collector Series
UN	United Nations (21018)
USR	Ultra Sonic Raider (9449)
VIP	LEGO VIP Points
WH	White House (21006)
WM	WalMart
WV	Winter Village (theme)
WVB	Winter Village Bakery (10216)
WVC	Winter Village Cottage (10229)
WVM	Winter Village Market (10235)
WVPO	Winter Village Post Office (10222)
WVTS	Winter Village Toy Shop (10199, 10249)
YMMV	Your Mileage May Vary

LEGO Terms and Acronyms - LEGO Terms and Acronyms.pdf

As a matter of fact, IMHO, I believe we are both correct - http://www.acronymfinder.com/Slang/IMHO.html

As a matter of fact, where did you put the Ostriches? 

LOL

Well I found a couple of odd acronyms from groups over at MOCpages.

LIFE = LEGO Is For Everyone
LOL = Lovers Of LEGO

Hey Fellas, is there a page dedicated to acronyms and Initialism here on Brickpicker?  If not, could we start one?

Edited October 22, 201510 yr by conceptmachine

I found one, but it doesn't look updated

 

Yep, this is it, but it's not updated regularly.

 

updated list and added excel sheet to OP for easy lookup

 

Edited October 22, 201510 yr by Bold-Arrow

Here are a few more some of you may not know:

QFLL - Quck Flip Low Life

YMMV - Your Mileage May Vary

FWIW - For What It's Worth

Ha!

For a while the only thing I could come up with for YMMV is "you make me vomit" as in, that deal is so crazy it makes me feel sick.

With all the acronyms in play as well as folks who prefer to just drop set numbers in their comments can someone create and implement a Lego Linkbot like they have over on reddit in /r/lego?  It would help fill in the holes of the conversation and end all the replies asking what is a TB QFLL.

See links for reference

https://www.reddit.com/user/LegoLinkBot/

www.reddit.com/r/lego

Updated the sheet, including the downloadable version.  If you any new suggestions, please throw them out there.

Some corrections to the current (March 4, 2016) list:

- EOL is also End-of-Life

- HH is also Heartlake (Grand) Hotel (not a fan of this abbreviation but have seen it used on this site more than once)

- MRSP should be MSRP

- DPCI is missing (Target inventory coding system - Department Product Class Item)

- KEM or KM - Kwik-E-Mart

- BRU - Babies'R'Us

- GBH - Gingerbread House

- GBHQ - Ghost Busters Head Quarter

- TBBT - The Big Bang Theory

- AoH - Assault on Hoth (or Affront on Hoth depending on your opinion on the set)

Those are great additions. I'll get to them soon.

36 minutes ago, Phil B said:

Some corrections to the current (March 4, 2016) list:

- EOL is also End-of-Life

- HH is also Heartlake (Grand) Hotel (not a fan of this abbreviation but have seen it used on this site more than once)

- MRSP should be MSRP

- DPCI is missing (Target inventory coding system - Department Product Class Item)

- KEM or KM - Kwik-E-Mart

- BRU - Babies'R'Us

- GBH - Gingerbread House

- GBHQ - Ghost Busters Head Quarter

- TBBT - The Big Bang Theory

- AoH - Assault on Hoth (or Affront on Hoth depending on your opinion on the set)

Forgot to shamelessly promote my own acronym: POOF = Professionally Obliterated by Our Forum.

Oh and add CL - Craigslist.com

Per @Alpinemaps suggestion: Adding the following:

KBZ - Kneel_before_Zod, one of the 4 hordesmen of the apocalypse.

HH used to be Haunted House...

HH used to be Haunted House...

? It is on the list....what did I miss?

WTH is HUKD or HKUD ?

1 hour ago, JDM said:

WTH is HUKD or HKUD ?

Hot

United

Kingdom

Deals

www.hotukdeals.com

 

ARSE

Always Regular Scams on Ebay

42 minutes ago, TabbyBoy said:

Hot

United

Kingdom

Deals

www.hotukdeals.com

 

TVM

ARSE
Always Regular Scams on Ebay

CAFE
crap acronyms f****** everywhere

One more to add to first post:   GOTG  (https://en.wikipedia.org/wiki/Guardians_of_the_Galaxy)

Edited July 27, 20223 yr by iriki

If this is the lexicon for BPers: 

"B-Factor" for GWPs and other "limited" promotions: the likelihood of complaints/out cry by various peanut galleries that may force LEGO to change course

I think we should credit BPer: Captain Obvious