| Abbreviation | Definition |
|---|---|
| SFRC | South Florida Riders Club |
| SGC | Scottsdale Gun Club |
| SGS | Scottish Genealogical Society |
| SHC | Secret Horse Club |
| SKA | Super Kinetic Association |
| SKC | South Korea Club |
| SLP | Slumber Party |
| SLS | Swinger Lifestyle |
| SLTT | Something Like That There |
| SMC | Sunday Morning Club |
| SME | Scale Model Equipment |
| SMG | Super Mario Galaxy |
| SMLC | Saskatoon Muzzle Loading Club |
| SMMC | Socks Make Me Cry |
| SMSA | Southern Maryland Sailing Association |
| SMW | Super Mario World |
| SNEHH | Scheme For North East Handloom And Handicrafts |
| SOG | Society Of Genealogists |
| SOG | Society Of George |
| SOG | Southern Ohio Guns |