addy address
adn any day now
afaik as far as i know
afk away from keyboard
aka also known as
are acronym-rich environment
atm according to me
attn attention
bak back at the keyboard
bbiab be back in a bit
bbl be back later
bbs be back soon
bfn bye for now
bif basis in fact
bion believe it or not
bioyiop blow it out your i/o port
bl belly laughing
brb be right back
bta but then again...
btw by the way
cu see you
cua common user access
cua commonly used acronym
cul see you later
cul8er see you later
cwyl chat with ya later
cya see ya
cyo see you online
dba doing business as
dfla disenhanced four-letter acronym
diku do i know you
dityid did i tell you i'm distressed
dtrt do the right thing
emfbi excuse me for butting in
eom end of message
eot end of thread
etla enhanced three-letter acronym
f2f face to face
faq frequently asked questions
fish first in, still here
fla four-letter acronym
fomcl falling off my chair laughing
fu fouled up
fud fear, uncertainty & doubt
fud fear, uncertainty, and disinformation
fwiw for what it's worth
fya for your amusement
fyeo for your eyes only
fyi for your information
ga go ahead
gal get a life!
gigo garbage in, garbage out
giwist gee, i wish i'd said that!
gmta great minds think alike
gol giggling out loud
gr&d grinning, running & ducking
gtrm going to read mail
hhok ha ha, only kidding
hhos ha ha, only serious
hng horny net geek
htd have to disagree
hth hope this helps
hthbe hope this has been enlightening
iac in any case
ianal i am not a lawyer
ianal i am not a lawyer, but
ic i see
icam i couldn't agree more
icowhmgowyhh i can only wonder how many glasses of wine you have had
id i disagree
iha i hate acronyms
iirc if i remember correctly
ijwtk i just want to know
ijwts i just want to say
ily i love you 
ilu i love you
imao in my arrogant opinion
imco in my considered opinion
imho in my humble opinion
imnsho in my not so humble opinion
imnsho in my not-so-humble opinion
imo in my opinion
inc illegitimi non carborundum
iow in other words
ipn i'm posting naked
irl in real life
irt in real time
ita i totally agree
itrw in the real world
jat just a thought
jfu just for you
jic just in case
jk just kidding
jmho just my humble opinion
jmo just my opinion
kwim know what i mean
l8r later
lbay laughing back at you
ld later, dude
ldr long-distance relationship
llta lots and lots of thunderous applause
lmao lauging my ass off
lol laughing out loud
lolbay laughing out loud back at you
ltm laugh to myself
ltns long time no see
m/f male or female
mego my eyes glazed over
mhoty my hat's off to you
mink multiple income, no kids
mm merrily met (greeting)
mmha2u my most humble apologies to you
moos member of the opposite sex
motos member of the opposite sex
moss member of the same sex
motss member of the same sex
motd message of the day
mp merrily parted
mud multi-user dungeon
nbif no basis in fact
nbir no basis in reality
np no problem
nrn no reply necessary
ns 'nuff said
oic oh, i see
oll on-line love
omg oh my god!
ootb out of the box
opm other people's money
otf on the floor
otoh on the other hand
otp on the phone
otth on the third hand
ottomh off the top of my head
pans pretty awesome new stuff
pc politically correct
pcmcia people can't master computer industry acronyms
pda public display of affection
pdq pretty darn quick
pebcak problem exists between chair and keyboard
pi or pic politically incorrect
pita pain in the ass
pmfji pardon me for jumping in
pmji pardon my jumping in
pots plain old telephone service
pov point of view
ppl peed pants laughing 
ppl people
pu that stinks!
puts playing under the sofa
re regarding or hello again
rl real life
roar laughing as loud as a lion
rofl rolling on floor, laughing
rotfl rolling on the floor laughing
rp romantic partner
rpg role-playing games
rsn real soon now
rw real world
ryo roll your own
sink single income, no kids
sitd still in the dark
sm smiley
so significant other
sol smiling out loud or sadly, outta luck
somy sick of me yet?
std sick to death
sts sorry to say
taf that's all, folks!
tafn that's all for now
tanstaafl there ain't no such thing as a free lunch
tat t¡§ote-a-t¡§ote
tcn take care now
tfh thread from hell
tfi the fact is
tfm thanks from me
tfmt thanks from me, too!
tgif thank god it's friday
thx Thanks
tia Thanks in advance
tfyf Thanks for your feedback.
tfyi Thanks for your interest.
tfyi Thanks for your information.
tfym Thanks for your time.
tfyr Thanks for your reply.
tfyt Thanks for your time.
tic tongue in cheek
tig this is great!
tiic the idiots in charge
tla three-letter acronym
tptb the powers that be
ttfn ta ta for now
ttyl talk to you later
txs thanks
tysm thank you so much
tyvm thank you very much
uapita you're a pain in the ass
unpc politically incorrect
vwp very well put
w4w word for word
wags what a great story!
wai what an inspiration!
wb welcome back
wdalyic who died and left you in charge?
wfm works for me
wibni wouldn't it be nice if
wp well put
wt what/who the
wtg way to go
wtgp want to go private
wts with that said
wu What's up?
wuf Where are you from?
wysiwyg what you see is what you get
xoxo kisses and hugs
xx kisses
yaag you are a genius
yabr you are being replaced
ymmv your mileage may vary
yrr you are right
yvmw you're very much welcome