| Jack and Jill | Bill (rhyming slang) |
| Jack dancer | Cancer (rhyming slang) |
| Jack of it! | Totally fed up with something |
| Jackaroo or Jillaroo | Trainee male or female Cattle Station hand |
| Jackie Howe | Blue singlets – worn by Australian truckers |
| Jack-in-the-box | Someone who can’t sit still |
| Jaffle | Toasted sandwich |
| Jaked | Broken |
| Jam jars | Thick lensed glasses (spectacles) |
| Jarmies | Pyjamas; bed clothes |
| Jerry | Bedpan; petrol can |
| Jiffy | Short time eg. be with you in a jiffy |
| Jiggered | Broken; useless |
| Jimmy Brit | Shit (rhyming slang) |
| by Jingos! | Exclamation of wonder |
| Job! | Hit; punch |
| Jocks | Male underpants |
| any old Joe Blow will tell you | Anyone can tell you; common knowledge |
| Joe Blake | Snake (rhyming slang) |
| Joe Bloggs | The average citizen |
| John | Toilet |
| Johnny Bliss | Piss (rhyming slang) |
| Joker | Comic |
| Journo | Journalist |
| Jumbuck | Sheep (Aboriginal word) |
| Jumper | Woolen sweater |
| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | PQ | R | S | T | UV | W | XYZ |
