| Abbreviation | Definition |
|---|---|
| IC | I See |
| IC | In Character |
| IC | In Chat |
| ICAM | I Couldn't Agree More |
| ICBM | I Can Be Mellow |
| ICBT | I Can't Believe This |
| ICC | I Can't Conform |
| ICC | I Can't Control |
| ICC | I Can't Cope |
| ICC | In Character Comment |
| ICCL | I Couldn't Care Less |
| ICD | I Cant Deal |
| ICD | I Can't Decide |
| ICE | I Can't Excrete |
| ICEPIIW | I Can't Even Put It In Words |
| ICIS | Icy Cold Intelligent Sister |
| ICMB | In Character Message Board |
| ICND | ICND Interconnecting Cisco Network Devices |
| ICOM | I Can't Open Mine |
| ICON | a small pictogram |