| Abbreviation | Definition |
|---|---|
| RCYB | Revolutionary Communist Youth Brigade |
| READY | Recording Emerging Adulthood in Deaf Youth |
| READY | Relationship Education Advancement and Development for Youth |
| REALITY | Rhymes Equal Actual Life in the Youth |
| RELAYS | Regional Education Legacy for Art and Youth Sport |
| REMY | Rival Epidermis Map Youth |
| REY | Re Engaging Youth |
| RFY | Religious Formation of Youth |
| RFY | Respect for Youth |
| RFY | Ride for Youth |
| RFY | Robotics For Youth |
| RGYL | Radnor Girls Youth Lacrosse |
| RHY | Respect and Honour Youth |
| RHY | Runaway and Homeless Youth |
| RHYA | Runaway and Homeless Youth Act |
| RHYTHM | Reaching Hearts of Youth Through Health and Movement |
| RIYE | Rotary International Youth Exchange |
| RIZZ | Retarded Incompetent Zealous Zombie |
| RN | Rn is a shortcut for the word "Right now" and is commonly used by teenagers nowadays. |
| ROYAL | Raising Our Youth As Leaders |