| Abbreviation | Definition |
|---|---|
| CRA | Can't Remember Anything |
| CRB | Come Right Back |
| CRBF | Chronic Resting B*tch Face |
| CRBT | Crying Real Big Tears |
| CRBT | Crying Really Big Tears |
| CRIBE | Chat Room In Broken English |
| CRITCH | Critch(ed),Stuck in a bad mental state |
| CRN | Can't Right Now |
| CRN | Crying Right Now |
| CROUVER | Create Your Way |
| CROW | Cyanide Remy Overdose And Wired |
| CRR | Chat Room Regular |
| CRS | Can't Remember Stuff |
| CRU | Cats Riding Unicycle |
| CRZY | Crazy |
| CS | Computer Science |
| CS | Cool Stuff |
| CSBTIA | Cool Story Bro! Tell It Again |
| CSBTIA | Cool Story Bro, Tell It Again! |
| CSF | Cool Sig Forums |