| Abbreviation | Definition |
|---|---|
| SMS | Slow Moving Software |
| SMS | So Much Shorter |
| SMS | Stop Making Sense |
| SMS | Stop Marriage Swiftly |
| SMT | Sick Minded Taggers |
| SMTWTFS | So Many Turtles Wear Track Fitting Shoes |
| SMU | Sailor Moon Universe |
| SMU | Still Most Underrated |
| SMUG | Seldom Met Users Group |
| SMURF | Small Men Under Red Father |
| SMURF | Socialist Men Under Red Father |
| SMURF | Summer Meeting Of Unity Relaxation And Footbag |
| SMUT | Second Myers Ultimate Team |
| SMYT | Show Me Your Tights |
| SNAFU | Slippy Network Administrators oFf-sick Utility |
| SNAFU | Slippy Network Administrators oF-sick Utility |
| SNAG | Sesshomaru Not A Girl |
| SNAP | Special Needs Aussie Placement |
| SNIT | Super Nerdy Intelligent Teenager |
| SNM | Sisters N Machines |