| Abbreviation | Definition |
|---|---|
| IYB | It's Your Business |
| IYD | In Your Dreams |
| IYDK | If You Do Know |
| IYDKYDG | If You Don't Know You Don't Go |
| IYDM | If You Dont Mind |
| IYDM | If You Don't Mind |
| IYF | Insert Your Favourite |
| IYGWIM | If You Get What I Mean |
| IYH | In Your Head |
| IYHO | In Your Humble Opinion |
| IYK | If You Know |
| IYKWIM | If You Know What I Mean |
| IYKYK | If You Know You Know |
| IYKYK | If You Know, You Know |
| IYLF | I'm Your Loner Friend |
| IYO | In Your Opinion |
| IYPNMP | It's Your Problem Not My Problem |
| IYQYQR | I Like You Like You Are |
| IYS | In Your Service |
| IYSWIM | If You See What I Mean |