| Abbreviation | Definition |
|---|---|
| IBM | International Bottle Mani |
| IBM | Intimidated By Microsoft |
| IBM | Irreparable Bad Memory |
| IBM | Isn't Betsy Marvelous |
| IBM | It Be Mine |
| IBM | It Beats Me |
| IBM | It Breaks Monthly |
| IBM | It's Better Manually |
| IBM | It's Big Money |
| IBM | It's Broken, Mate |
| IBM | Itty Bitty Machine |
| IBM | Itty Bitty Machines |
| IBM | Itty Bitty Minds |
| IBM | I'ze Better'n Most |
| IBS | Idiot Boy Syndrome |
| IC | Insane Clown |
| ICA | Ivan Codd Approved |
| ICBIHRTBB | I Cant Believe I Havent Rated This Beer Before |
| ICBM | I Can't Build a Missile |
| ICBM | I Could Be a Moron |