Thank you KaylynnCouture & ApotheKaren for updating list!

AFAIC = As Far As I'm Concerned
AFAIK = And For All I Know /As far as I know
AFK = Away From Keyboard
AFKBPOFPOPL = Association For Keeping Basement Party On Front Page Of Parking Lot
AKA = Also Known As
AI = Artificial Intelligence
BARD = Beyond a Reasonable Doubt
BFF = Best Friend(s) Forever
BBIAB = Be Back In A Bit
BBL = Be Back Later
BBS = Be Back Soon
BBM = Bolded By Me
BH = Bounty Hunters
BRB = Be Right Back
BS = (This isn't) Bull Snot.
BTDT = Been there Done That
BTW = By The Way
BUMP = “Bumping" this post to the top of the thread
COD = Cause Of Death
DA = District Attorney
DD = Dear Daughter or Darling Daughter
DH = Dear Husband or Darling Husband
DIL = Daughter In Law
DLC = Date of Last Contact
DP = Death Penalty
DS = Dear Son
DT = Defense Team
DW = Dear Wife
ETA = Estimated Time of Arrival OR Edited to Add
FB = Facebook
FTR = For The Record
FUBAR = Fouled Up Beyond All Recognition
FWIW = For What It's Worth
GF = Grandfather
GGP = Gotta Go Pee
GM = Grandmother
GP = Grandparents
GMAB = Give Me a Break
HLN = Headline news
HNN = Headline News Network
HRD = Human Remains Detection (K-9)
HTH = Hope This Helps OR Happy To Help
IANAL = I am not a lawyer
IDI = Intruder Did It / I Doubt It
IMOO = In my own opinion
IIRC = If I Recall Correctly
IYKWIM = If You Know What I Mean
IKWYM = I Know What You Mean
IMO = In My Opinion
IMHO = In My Honest/Humble Opinion
IOW = In Other Words
IRL = In Real Life
ITA = I Totally Agree / I Think Alike
ITE = In the end
JK = Just Kidding
JMHO = Just My Humble Opinion/Just My Honest Opinion
JMO = Just My Opinion
JVM = Jane Velez Mitchell (crime talk show on Headline News)
KWIM = Know What I Mean?
LCBD = Looks Can Be Deceiving
LE = Law Enforcement
LDT = Lie Detector Test
LOL = Laughing Out Loud
LKP = Last Known Place
LWOP = Life Without Parole
ME = Medical Examiner
MIA = Missing in action
MOD = Manner of Death or Moderator; not to be confused with each other
MOO = My Own Opinion /My Opinion Only
MS = MySpace
MSM = Main Stream Media
NG = Nancy Grace (crime talk show on Headline News)
OJ = Obstruction of Justice
OMG = Oh My Gosh/Oh My Goodness/Oh My God
OP = Opening Post /Opening Poster /Original Poster
O/T = Off Topic
OTOH = On The Other Hand
OW = Outstanding Warrants
PC = Press Conference
PD = Police Department OR Physical Description
PITA = Pain In The Arse
PLS = Place Last Seen
PO = Police Officer
POI = Person Of Interest
POS = Piece of *****
PM = Private Message
PA = Prosecuting Attorney
PERP = Perpetrator
PI = Private Investigator
PD = Public Defender
RBBM = Respectfully bolded by me
RSBM = Respectfully snipped by me
RL = Real life
ROFL = Rolling On The Floor Laughing
ROFLMAO = Rolling On The Floor Laughing My Arse Off
ROFLMAOPMP = Rolling On The Floor Laughing My Arse Off Peeing My Pants
ROFLMBO = Rolling On The Floor Laughing My Butt Off
RSO = Registered Sex Offender*
SA = States Attorney
SAR = Search and Rescue
SBM = Snipped by me
SD = Self Defense
SF = Stepfather
SIL = Son In Law
SM = Stepmom/mother
SMH = Shaking My Head
SNAFU = Situation Normal All Fouled Up
SO = Significant Other
SOB = Scroll On By
SODDI = Some Other Dude Did It (a defense strategy)
SOR = Sex Offender Registry
STBX = Soon to be ex (spouse)
SUS = Suspicious
SW = Search Warrant
SWAG = Silly Wild Arse Guess
TARFU = Things are really fouled up
TH = Talking Heads (people on national media shows arguing positions)
TIA = Thanks in Advance
TOD = Time of Death
TOS = Terms of Service
TTYL = Talk To You Later
TY = Thank You
TYVM = Thank you very much
UA = Urinalysis/ Urine Analysis
UID = Unidentified; term used for a john or jane doe
WRT = With regard to
WTH = What The Heck
WTWS = Welcome To WebSleuths
YW = You're Welcome

*In general, use the term RSO rather than "SO." For unregistered sex offenders, use description that indicates their status. For unconvicted offenders, use "alleged." For convicted sex offenders who no longer must register (e.g. expiration of registration period), use "former registered sex offender." For those who've never had to register due to state law preclusions, and all others convicted in a court of law, use "convicted sex offenders." The term "predator" may also be used when appropriate in a legal sense, or colloquially, for any reference to a sex offender.