| Abbreviation | Definition |
|---|---|
| ICOU | Internet Community Of Unity |
| ICP | I Can Play |
| ICP | I Can't Promise |
| ICP | Inane Clown Poseurs |
| ICQ | I Cheat Quietly |
| ICR | I Can't Remember |
| ICS | Inner City Sleeping |
| ICST | I Can't Stop Thinking! |
| ICSY | I Can't Sleep Yet |
| ICTF | I'm Close To Finishing |
| ICTYBTIHTKY | I Could Tell You, But Then I'd Have to Kill You |
| ICU | I See You |
| ICUDK | In Case you Didn't Know |
| ICW | I Can't Wait |
| ICWUM | I See What You Mean |
| ICYDN | In Case You Didn't Know |
| ICYMI | In Case You Missed It |
| ID | I Deserve |
| IDAC | I Don't Actually Care |
| IDAFY | I'll Do Anything For You |