S - Smile
S - Smiling
S/O - Sold out
S/O, s/o - Someone
S/TH, s/th - Something
S/U - Shut up
S/W - Software
S^ S'up - What's up
S2BX - Soon to be ex
S2R - Send to receive
S4L - Spam for life (when you become someone's customer or client)
SA - Say
SA - Selective availability
SAF - Single Asian female
SAHD - Stay at home dad
SAHM - Stay at home mom
SAL - Such a laugh
SAM - Single Asian male
SAMAGAL - Stop annoying me and get a life
SAMFU - Self-adjusting military foul up
SAMFUTU - Situation abnormal, more fouled up than usual
SAPFU - Surpassing all previous foul ups
SASS - Short attention span society/syndrome
SAYOR - Speak at your own risk
SB - Smiles back
SBB - Stupid beyond belief
SBCN - Sitting behind the computer, naked
SBD - Silent but deadly
SBF - Single black female
SBM - Single black male
SBR - Smart butt remark
SBT - Strange but true
SBTA - Sorry, being thick again
SBUG - Small bald unaudacious goal
SC - Stay cool
SCDD - Same crap different day
SCDD - Same crap different depth
SCNR - Sorry, could not resist
SD - Stepdaughter
SDIHTT - Someday I'll have the time
SE2E - Smiling ear to ear
SEC - Second, wait a second
SEC - Wait a second
SEC - Wait just a second
SED - Said enough darling
SEG - Seductively evil grin
SEL - Select
SEP - Somebody else's problem
SEP - Someone else's problem
SETE - Smiling ear to ear
SEU - Single event upset
SEW - Sleep well, eat well
SF - Science fiction
SF - Speculative fantasy
SF - Stepfather
SF - Surfer friendly
SFAIAA - So far as I am aware
SFETE - Smiling from ear to ear
SFLA - Stupid four letter acronym
SFT - Sorry for that
SFX - Sound effect(s)
SH - Same here
SH - So hot!
SH - Stuff happens
SHAM - Stay at home mom
SHCOON - Shoot hot coffee out of nose
SHDO - Stuff happens, drive on
SHICPMP - So happy I could pee my pants
SHID - Slaps head in disgust
SHLH - Sitting here lauging hysterically
SHLM - Shalom
SHMILY - See how much I love you
SHOPN - Shopping
SHTDI - Somebody has to do it
SHTS - Spit hitting the spam
SHTSI - Somebody had to say it
SIC - Spelling is correct
SICL - Sitting in chair laughing
SICNR - Sorry, I could not resist
SICS - Sitting in chair snickering
SIG - Signature
SIG - Special interest group
SIG2R - Sorry, I've got to run
SII - Seriously impaired imagination
SIIK - Stuffed if I know!
SIIN - Stuffed if I know!
SIL - Mother in law
SIL - Sister in law
SIL - Son in law
SIM - Simulator
SIT - Stay in touch
SITCOM - Single income, two children, oppressive mortgage
SITD - Still in the dark
SITM - Silent in the morning
SITWB - Sorry, in the wrong box
SIYNE - Smilies if you need em
SJF - Single Jewish female
SJM - Single Jewish male
SK8 - Skate
SK8ER, Sk8r - Skater
SKOTC - Soft kiss on the cheek
SLA - Service level agreement
SLAP - Sounds like a plan
SLATFATF - So long, and thanks for all the fish
SLAW - Sounds like a winner
SLIRK - Smart little rich kid
SLM - See last mail
SLMR - Silly little mail reader
SLT - Something like that
SM - Stepmother
SMAIM - Send me an instant message
SMB - Spank my butt
SME1 - Someone
SMEF - Serious massive existence failure
SMEM - Send me e-Mail
SMH - Shaking my head
SMHID - Scratching my head in disbelief
SMIM - Send me an instant message
SMMWO - Shut my mouth wide open
SMO - Serious mode on
SMO - Simple matter of
SMOFF - Serious mode off
SMON - Serious mode on
SMOP - Small matter of programming
SMS - Short message service
SMTG - Something
SMTOE - Sets my teeth on edge
SMTWGWLAF - Slapping my thighs while giggling wildly like a fool
SMTWTFS - Slapping my thighs while terribly foolishly snickering
SN - Screen name
SNAC - Sitting naked at computer
SNAFU - Situation normal, all fouled up
SNAFU - Situation normal, all frigged up
SNAG - Sensitive new age guy
SNAILMAIL - US postal mail service
SND - Sound
SNERT - Snotty nosed egotistical rotten teenager
SNFIAA - Still no friggin' idea at all
SNR - Signal to noise ratio
SO - Significant other (spouse, boy/girlfriend)
SOASF - So on and so forth
SOB - Son of a bitch
SOB - Son of a gun
SOB - Stressed out bigtime
SOC - Soap opera central
SOE - Stupid operator error
SOH - Sense of humor
SOH - Start of header
SOHB - Sense of humour bypass
SOHF - Sense of humor failure
SOHO - Small office, home office
SOI - Self owning idiot
SOI - State of insanity
SOI - Stink on ice
SOIAR - Sit on it and rotate
SOL - Shoot, out of luck
SOL - Simply out of luck
SOL - Smilling out loud
SOL - Sooner or later
SOM - Start of message
SOM1, SOME1 - Someone
SOMY - Sick of me yet?
SOP - Standard operating procedure
SORAS - Soap opera rapid aging syndrome
SorG - Straight or gay?
SOS - Help!
SOS - Same old stuff
SOS - Save our ship (need help, emergency)
SOS - Save our souls
SOS - Someone over shoulder
SOS - Someone special
SOS - Stuck on stupid
SOSO - Same old, same old
SOT - Short of time
SOT - Short on time
SOTA - State of the art (latest technology)
SOTD - Speaking of the devil
SOTMG - Short of time, must go
SOTMG - Short on time, must go
SOVS - Someone very special
SOW - Speaking of which
SOX - Sound exchange
SOZ - Sorry
SP - Sweetie pie
SP? - Spelling?
SPAM - Junk, unwanted e-mail
SPAM - SPiced hAM (Hormel's canned meat)
SPAM - Stupid persons advertisement
SPDD - Same poo, different day
SPF - Shortest path first
SPK 2U L8R - Speak to you later
SPK - Speak
SPST - Same place, same time
SQ - Squeezed (files)
SRO - Standing room only
SRP - Suggested retail price
SRY - Sorry
SS - Smiles
SS - So sorry
SS - Stepson
SSC - Super sexy cute
SSDD - Same stuff, different day
SSDD - Same stuff, different depth
SSEWBA - Someday soon, everything will be acronyms
SSI - Small scale integration
SSIA - Subject says it all
SSM - So, sue me
ST - Star Trek
ST - Such that
ST - Super tired
ST, s.t. - Such that
ST2MORO - Same time tomorrow
STATS - Age/gender/location check
STBID - Sometime before I die
STBX - Soon to be ex
STBY - Sucks to be you
STD - Seal the deal
STD - Standard
ST-DS9 - Star Trek, deep space 9
STFU - Shut the flip up
STFW - Search the fine web
STFW - Search the freaking web
STFW - Search the friggin' web
STI - Stick(ing) to it
STI, ST-TMP - Star Trek I the motion picture
STID - Still in the dark
STIFF - Stiff, said loudly
STII / ST-WOK - Star Trek II / wrath of khan
STIII / ST-SFS - Star Trek III / search for spock
STIV / ST-TVH - Star Trek IV / the voyage home
STO - Sticking out tongue
STR8 - Straight
STRA - Stray
STS - So to speak
STS - Sorry to say
ST-TFF - Star Trek V the final frontier
ST-TNG - Star Trek, the next generation
ST-TOS - Star Trek, the original series
ST-TUC - Star Trek VI the undiscovered country
ST-TVH - Star Trek IV the voyage home
STUL - Speak to you later
STV / ST-TFF - Star Trek V / the final frontier
STVI / ST-TUC - Star Trek VI / the undiscovered country
ST-VOY - Star Trek, voyager
STW - Search the web
ST-WOK - Star Trek II wrath of khan
STX - Start of text
STYS - Speak to you soon
SU - Shut up
SUAD - Shut up and deal
SUAKM - Shut up and kiss me
SUB - Sign up board
SUB - Substitute
SUB - Subtract
SUFID - Screwing up face in disgust
SUGARPIC - Suggestive or erotic picture of self
SUITM - See you in the morning
SUL - See you later
SUL - Snooz, you loose
SUM1 - Someone
SUNOILTY - Shut up, no one is listening to you
SUP - What's up?
SUPERCAL - Supercalifragilisticexpealidocious
SUS - See you soon
SUSFU - Situation unchanged, still fouled up
SUSFU - Situation unchanged, still frigged up
SUYF - Shut up you fool
SUYP - Shut up you pervert
SW - Says who?
SW - Says whom?
SW - Second wife
SW - Shareware
SW - So what?
SW - Star Wars
SWAG - Stupid/sceintific wild-bummed guess
SWAK - Sealed with a kiss
SWALK - Sealed with a loving kiss
SWALK - Sweet, with all love, kisses
SWATK - Sealed with a tender kiss
SWBG - Scientific wild butt guess
SWBG - Stupid wild butt guess
SWCOC - Special wishes, comments, or corrections
SWDYRTW - Since when do you rule the web?
SWDYT - So what do you think?
SWEG - Scientific wild eyed guess
SWF - Single white female
SWG - Scientific wild guess
SWHT - Sweet heart
SWHT - Sweetheart
SWIM - See what I mean?
SWL - Screaming with laughter
SWM - Single white male
SWMBO - She who must be obeyed (the wife)
SWOT - Strengths, weaknesses, opportunities, threats
SW-SE - Star Wars special edition
SWT - Sweet
SWTDRMZ - Sweet dreams
SWYP - So what's your problem?
SY - Sincerely yours
SYITM - See you in the morning
SYL - See you later
SYLA - See you later alligator
SYOTB - See you on the board
SYS - See you soon
SYS - System
SYT - Sweet young thing
SYUTH - Smack you upside the head
SYWWTBY - See ya, wouldn't want to be ya