| Abbreviation | Definition |
|---|---|
| ROSHAN | Responsibility Obedient Satisfied Helpful Available Natural |
| ROSL | Rolling On Sky Laughing |
| ROSY | Remove OverSized Yews |
| ROTC | Rediculous and Offensive Training Corps |
| ROTC | Retards On The Campus |
| ROTC | Rotten Old Team Cowards |
| ROTC | Rotten Old Tin Can |
| ROTC | Run Off That Cliff |
| ROTC | Running Off To Canada |
| ROTFL | Rats Only Talk Flow Laugh |
| ROTFL | Roll Over The Floor Laughing |
| ROTFLBTCDICAJTTWADBSIHPWTRHITSBKABAYB | Rolling On The Floor Laughing Biting The Carpet Dancing In Circles And Jumping Through The Window Almost Dieing By Smashing Into HP Who's Then Running Horrified Into The Street Beeing Killed Accidenta |
| ROTFLDM | Rolling On The Floor Laughing Like Draco Malfoy |
| ROTFLMAO | Risking One Today For Lots More After October |
| ROTFLMAOYSST | Rolling On The Floor Laughing My A** Off Yet Somehow Still Typing |
| ROTFLMDO | Rolling on The Floor Laughing My Dentures Out |
| ROTFLMFAO | Rolling On The Floor Laughing My Freaking Ass Off |
| ROTFLSHMSFOAIDMT | Rolling On The Floor Laughing So Hard My Sombrero Fell Off And I Droped My Taco |
| ROUO | Reasons Of Unknown Origin |
| ROUS | Rats Of Unusual Size |