| Abbreviation | Definition |
|---|---|
| IQ | Irrelevant Question |
| IQS | I Quit Smoking |
| IR | I Remember |
| IRA | I Ran Away |
| IRB | I Ref Badly |
| IRC | Internet Relay Chat |
| IRCD | Internet Relay Chat daemon |
| IRCP | Internet Relay Chat Probe |
| IRDC | I Really Don't Care |
| IRDK | I Really Dont Know |
| IRDK | I Really Don't Know |
| IRF | Is Remarkable For |
| IRGTGBTW | I've Really Got To Get Back To Work |
| IRL | I'm Really Lieing |
| IRL | I'm Right Luy |
| IRL | In Real Life |
| IRL | It's Ridiculously Lame |
| IRLU | I Really Like You |
| IRS | I Respect Someone |
| IRS | I'm Really Sexy |