| S | Smiling | |
| S2R | Send To Receive | |
| S4L | Spam For Life | |
| SB | Should Be | |
| SB | Smiling Back | |
| SCNR | Sorry, Could Not Resist | |
| SDIHTT | Someday I'll Have The Time | |
| SED | Said Enough Darling | |
| SEP | Somebody’s Else’s Problem | |
| SETE | Smiling Ear To Ear | |
| SF | Surfer Friendly | |
| SFB | Sausage For Brains | |
| SFETE | Smiling From Ear To Ear | |
| SFX | Sound Effects | |
| SH | Same Here | |
| SHCOON | Shoot Hot Coffee Out Of Nose | |
| SHID | Slaps Head In Disgust | |
| SIL | Sister-In-Law | |
| SIL | Son-In-Law | |
| SIT | Stay In Touch | |
| SITD | Still In The Dark | |
| SK8 | Skate | |
| SK8R | Skater | |
| SLIRK | Smart Little Rich Kid | |
| SLY | Still Love You | |
| SMAIM | Send Me An Instant Message | |
| SMEM | Send Me An E-Mail | |
| SMH | Shaking My Head | |
| SN | Screen Name | |
| SNAFU | Situation Normal, All Fouled Up | |
| SNERT | Snot Nosed Egotistical Rude Teenager | |
| SNMP | So Not My Problem | |
| SO | Significant Other | |
| SOB | Bad Person | |
| SOHF | Sense Of Humor Failure | |
| SOL | Seriously Out Of Luck | |
| SOMY | Sick Of Me Yet? | |
| SOOI | Stay Out Of It | |
| SOS | Same Old Stuff | |
| SOS | Someone Over My Shoulder | |
| SOS | Someone Special | |
| SOSG | Someone Over Shoulder Gone | |
| SOSO | Same Old, Same Old | |
| SOT | Short Of Time | |
| SOTMG | Short Of Time, Must Go | |
| SP? | Spelling? | |
| SPK | Speak | |
| SPKR | Speaker | |
| SPST | Same Place Same Time | |
| SRRY | Sorry | |
| SRSLY | Seriously | |
| SRY | Sorry | |
| SSDD | Same Stuff, Different Day | |
| STFU | Shut The Freak Up | |
| STFW | Search The Freaking Web | |
| STHU | Shut The Heck Up | |
| STPD | Stupid | |
| STR8 | Straight | |
| STTH | Speak To The Hand | |
| STW | Search The Web | |
| STYS | Speak To You Soon | |
| SU | Shut Up | |
| SUAFU | Situation Unchanged, All Fouled Up | |
| SUM1 | Someone | |
| SUP | What's Up | |
| WU | What’s Up | |
| SUYF | Shut Up You Fool | |
| SWAK | Sealed With A Kiss | |
| SWALK | Sealed With A Loving Kiss | |
| SWDY | So What Do You Think? | |
| SWDYWTTA | So What Do You Want To Talk About | |
| SWL | Screaming With Laughter | |
| SWMBO | She Who Must Be Obeyed | |
| SYIH | See You In Hades | |
| SYL | See You Later | |
| SYS | See You Soon | |
| SYSOP | System Operator | |
| SYT | See You Tomorrow | |
| (-: to the Emoticons :-) |
