| Abbreviation | Definition |
|---|---|
| SMH | Shaking My Head |
| SMIM | Send Me an Instant Message |
| SMOK | Smoke |
| SMOS | Send Messages Over SMS |
| SMTM | Scam Must Take Money |
| SNF | That's eNough |
| SNQ | So Not Quite |
| SOAL | Story Of A Life |
| SOKO | South Korea |
| SOL | Seems Only Likely |
| SOL | Sure Out of Luck |
| SOMY | Story Of My Life |
| SONAL | Sexy Outstanding Naughty Attitude Lovely |
| SOS | Save Our Ship |
| SPAM | Special Projected Annoying Message |
| SPST | Same Place Same Time |
| SQ | Sorry Quotes |
| SRI | Sending Route Information |
| SRRY | Sorry |
| SRSLY | Seriously |