| I'll pay that (v) | i admit, you outsmarted me. |
| ice block (n) | Popsicle, sometimes used for ice cube. |
| ice cream spider (n) | soda float Usually coke with ice cream on top, since root beer isn't generally available. |
| icy pole (n) | Popsicle |
| identity (adj) | person of note, celebrity "Prominent Perth identity Joe Blow was arrested." |
| I'll be stuffed! | expression of surprise |
| impact sprinkler (n) | rainbird sprinkler |
| impost (n) | customs duty; tax penalty; race horse handicap weight |
| imputation (adj) | way of avoiding double taxation on dividends See section on franking credits. |
| I'm stuffed (adj) | I'm tired. |
| incursion (n) | An exhibition that travels to a school |
| interval (n) | intermission, as in a play or concert "The band will return after the interval." |
| inverted commas (n) | quotation marks |
| irrits (v) | to irritate someone |
| it's a goer (adj) | it will work |
| it's a take (adj) | it's a fraud |
| it's gone missing (adj) | it's disappeared |
| I-tie (n) | Italian |
| it's gone walkabout (adj) | it's missing |
| it's yum (adj) | it's yummy |