| | IANAL | | I am not a laywer |
| | IANAL | | I'm not a Lawyer |
| | IANARS | | I am not a rocket scientist |
| | IANMTU | | I am not making this up |
| | IANYM | | In A New York Minute |
| | Ianys | | International Association for National Youth Service |
| | IAP | | Internet Access Provider |
| | IARTPFWTSIOWIM | | I Am Repeating This Parrot Fashion Without The Slightest Idea Of What It Means |
| | IASA | | I Am So Annoyed |
| | iash | | I am so horney |
| | iash | | I am so horny |
| | IAT | | I am tired |
| | IATA | | International Air Transport Association |
| | IAU | | I adore you |
| | IAW | | In Another Window |
| | iawc | | in a while crocodile |
| | IAWTC | | I agree with this comment |
| | IAWTC | | I Agree with This/That Comment |
| | IAWTP | | I Agree With This Post |
| | IB | | I'm Back |
| | ib6ub9 | | I be 6 you be 9 |
| | ib6ub9 | | I be six you be nine |
| | iban | | international bank account number |
| | IBB | | I'll Be Back |
| | IBC | | inadequate but cute |
| | IBC | | Inadequate, But Cute |
| | IBEG | | I'd Be Eternally Grateful |
| | IBEG | | I'll Be Eternally Grateful |
| | IBFY | | In Business For Yourself |
| | IBM | | Inadequate, But Marketable |
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